技术领域technical field
本发明涉及化学分析技术领域，特别是涉及一种测试范围为4.6-7.6的pH值测试液及其制备方法。The invention relates to the technical field of chemical analysis, in particular to a pH value test solution with a test range of 4.6-7.6 and a preparation method thereof.
背景技术Background technique
溶液的酸碱度值表示的是溶液中H+和OH-离子的浓度，缩写为pH值，是衡量溶液酸碱程度的数量指标，其定义为溶液中H+浓度的负对数。pH值越低酸性越强，pH值越高碱性越强。溶液的pH值是分析化学中最基础的一个指标，经常需要测定。由pH值的定义可以知道，pH值是衡量溶液酸碱性的尺度，在很多方面需要控制溶液的酸碱性，因此，pH值的精确而方便的测试具有重要意义。The pH value of a solution indicates the concentration of H+ and OH- ions in the solution, abbreviated as pH value, which is a quantitative indicator to measure the acidity and alkalinity of the solution, which is defined as the negative logarithm of the H+ concentration in the solution. The lower the pH, the stronger the acid, and the higher the pH, the stronger the alkaline. The pH value of a solution is the most basic indicator in analytical chemistry and needs to be measured frequently. From the definition of pH value, it can be known that pH value is a scale to measure the acidity and alkalinity of a solution, and it is necessary to control the acidity and alkalinity of a solution in many aspects. Therefore, an accurate and convenient test of pH value is of great significance.
pH值的测试方法主要有三种：第一种是使用各种精度的pH的试纸，第二种是使用便携和台式的pH笔，第三种是使用pH测试液。There are three main methods for testing the pH value: the first is to use various precision pH test papers, the second is to use portable and desktop pH pens, and the third is to use pH test solution.
pH值的试纸：目前，实验室外简便测量pH值的方法大多采用pH值试纸以及pH值精密试纸，方便快捷，价格低廉，携带方便，不受使用环境的影响，不受使用者知识技能的影响。使用试纸可以很快的测试出待测液体的酸碱性。其制作方式是将多种pH值显色药剂按照适当比例配成溶液，然后将滤纸浸入其中，溶剂挥干即得成品，使用时将纸条浸入待测液体中根据颜色的变化和比色卡比对得到液体大约的pH值数值。由于试纸pH值的比色是在纸质载体上进行，和原溶液的水质载体完全不同，所以比色不易观察，并且还由于试纸上待测液体的液体量相对较少，通常不到一滴，故而不能忽视显色药剂本身固有酸碱性对待测液体酸碱性的影响，所以检测结果受显色药剂本身的影响较大。故而试纸法存在不易观察、精度不足的特点，对一些要求pH值精度的场所不太适合。pH test paper: At present, most of the methods for measuring pH outside the laboratory are pH test paper and pH precision test paper, which are convenient, fast, low in price, easy to carry, and are not affected by the use environment or the user's knowledge and skills. influences. Using test paper can quickly test the acidity and alkalinity of the liquid to be tested. Its production method is to make a variety of pH value chromogenic agents into a solution in an appropriate proportion, then soak the filter paper in it, and evaporate the solvent to get the finished product. When using it, dip the paper strip into the liquid to be tested according to the color change and the color chart Compare to get the approximate pH value of the liquid. Since the colorimetry of the pH value of the test paper is carried out on the paper carrier, which is completely different from the water carrier of the original solution, the colorimetry is not easy to observe, and because the amount of liquid to be tested on the test paper is relatively small, usually less than one drop, Therefore, the influence of the inherent acidity and alkalinity of the chromogenic reagent itself cannot be ignored, so the test results are greatly affected by the chromogenic reagent itself. Therefore, the test paper method has the characteristics of difficult observation and insufficient precision, and is not suitable for some places that require pH accuracy.
便携和台式的pH笔：便携pH值笔可以用于实验室外快速检测，结果可靠，在正确使用下可以准确的读出溶液的pH值。但是pH笔有电子设备普遍存在的问题，如高温、高湿环境不适合使用，传感器、电路的设计合理性直接影响仪器的精度和重现性、仪器需要不定期的进行矫正、对仪器的保管也有一定要求。相对测试液、测试试纸来比较，响应时间较慢，总体操作较麻烦，价格较贵。便携pH笔的使用对使用者也有一定的要求，例如要不断搅拌待测液体，并且不能在传感器探头内外存在空气气泡等等，这些对于完全没有化学经验的使用者来说，也较为困难。Portable and desktop pH pens: Portable pH pens can be used for rapid detection outside the laboratory, with reliable results, and can accurately read the pH value of the solution when used correctly. However, the pH pen has common problems in electronic equipment, such as high temperature and high humidity environment are not suitable for use, the rationality of sensor and circuit design directly affects the accuracy and reproducibility of the instrument, the instrument needs to be corrected irregularly, and the storage of the instrument There are also certain requirements. Compared with test solution and test paper, the response time is slower, the overall operation is more troublesome, and the price is more expensive. The use of a portable pH pen also has certain requirements for the user, such as constantly stirring the liquid to be tested, and not having air bubbles inside and outside the sensor probe, etc. These are also difficult for users who have no chemical experience.
pH测试液：目前，市场上可以买到的相关测试液分为使用单一显色药剂配置的测试液和使用多种显色药剂配置的测试液。用单一显色药剂配置而成的测试液,如pH值3.0～4.5测试液，使用溴酚蓝作为显色药剂；pH值4.0～5.6测试液，使用溴甲酚蓝作为显色药剂；pH值6.0～7.6测试液，使用溴麝香草酚蓝作为显色药剂等。由于显色范围太窄，pH值超过了测定范围都无法测定，限制了其应用，同时也存在颜色不易观察，稳定性差和易撒漏的问题。另外，多种组分的显色药剂配置的测试液，如市场上可见pH值4～10测试液，其配方不详，在使用过程中，不同购买来源的这种测试液显色效果大致相同，仅仅是药液浓度的差异。测定待测溶液pH值时，肉眼极其勉强的可以观察到pH在0.5精度时引起显色药剂的颜色变化，有些显色区间在pH1.0精度下都很勉强观察到；多种组分的显色药剂配置的测试液的溶剂系水和乙醇的混合溶剂，由于乙醇的易挥发特性导致其在储存过程体积逐渐减少，因此在使用几个月后会发现溶液减少，而且，产生溶质析出以及氧化变质的现象，同时，在转移运输过程中也会有比较严重的撒漏。pH test solution: At present, relevant test solutions available on the market are divided into test solutions prepared with a single color-developing agent and test solutions prepared with multiple color-developing agents. A test solution prepared with a single color reagent, such as a test solution with a pH value of 3.0 to 4.5, using bromophenol blue as a color reagent; a test solution with a pH value of 4.0 to 5.6, using bromocresol blue as a color reagent; 6.0 to 7.6 test solution, use bromothymol blue as the color reagent, etc. Because the color range is too narrow, the pH value cannot be measured beyond the measurement range, which limits its application. At the same time, it also has the problems of difficult observation of color, poor stability and easy leakage. In addition, the test solution prepared by multi-component color reagents, such as the test solution with a pH value of 4 to 10 in the market, has an unknown formula. During use, the color development effect of this test solution from different purchase sources is roughly the same. The only difference is the concentration of the liquid medicine. When measuring the pH value of the solution to be tested, the naked eye can barely observe the color change of the chromogenic agent when the pH is at an accuracy of 0.5, and some color intervals can be barely observed at an accuracy of pH 1.0; the display of various components The solvent of the test solution prepared by the color reagent is a mixed solvent of water and ethanol. Due to the volatile nature of ethanol, its volume gradually decreases during storage. Therefore, it will be found that the solution will decrease after several months of use, and solute precipitation and oxidation will occur. The phenomenon of deterioration, at the same time, there will be more serious leakage during the transfer and transportation process.
发明内容Contents of the invention
本发明的目的是针对现有技术中存在的技术缺陷，而提供一种在4.6～7.6的测试范围内显示不同颜色的高精度pH测试液。The purpose of the present invention is to provide a high-precision pH test solution that displays different colors within the test range of 4.6 to 7.6 aiming at the technical defects in the prior art.
本发明的另一个目的是提供一种测试范围在4.6～7.6范围内的高精度测试液的制备方法。Another object of the present invention is to provide a method for preparing a high-precision test liquid with a test range of 4.6 to 7.6.
为实现本发明的目的所采用的技术方案是：The technical scheme adopted for realizing the purpose of the present invention is:
一种测试范围为4.6-7.6的pH值测试液，按照重量百分比的组成为：有机溶剂50～60％，增稠剂0.5～3％，抗氧剂0.5～1％，乙氧基黄叱精1～2％，石蕊2～3％，溴甲酚紫0.5～1％，中性红0.5～1％，亚甲基蓝0.2～0.5％，余量的蒸馏水；所述有机溶剂为具有增加显色剂溶解度的特性的溶剂，所述抗氧剂为具有防止显色剂氧化变质的物质，所述增稠剂为具有增加测试液粘稠度的惰性物质。A pH value test solution with a test range of 4.6-7.6, which is composed of 50-60% organic solvent, 0.5-3% thickener, 0.5-1% antioxidant, and ethoxylated yellow chili 1-2%, litmus 2-3%, bromocresol violet 0.5-1%, neutral red 0.5-1%, methylene blue 0.2-0.5%, the rest distilled water; The solvent with the characteristics of solubility, the antioxidant is a substance that prevents the oxidative deterioration of the color developer, and the thickener is an inert substance that increases the viscosity of the test solution.
所述有机溶剂为丙酮、乙二醇和丙二醇中的至少一种。The organic solvent is at least one of acetone, ethylene glycol and propylene glycol.
所述抗氧剂为抗坏血酸、硫代硫酸钠和丁基羟基茴香醚中的至少一种。The antioxidant is at least one of ascorbic acid, sodium thiosulfate and butylated hydroxyanisole.
所述增稠剂为果胶、海藻酸、壳聚糖或明胶中的至少一种。The thickener is at least one of pectin, alginic acid, chitosan or gelatin.
一种pH值测试液的制备方法，包括下述步骤：A preparation method for a pH value test solution, comprising the steps of:
(1)将有机溶剂、增稠剂和抗氧剂加热溶解成混悬溶液；(1) heating and dissolving the organic solvent, thickener and antioxidant into a suspension solution;
(2)将乙氧基黄叱精、石蕊、溴甲酚紫、中性红和亚甲基蓝加入到步骤(1)所得的混悬溶液中，研磨，待溶解完全后用蒸馏水补足到足量。(2) Add ethoxylated ciprofloxacin, litmus, bromocresol violet, neutral red and methylene blue to the suspension solution obtained in step (1), grind, and make up to a sufficient amount with distilled water after the dissolution is complete.
与现有技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:
1.本发明的测试液通过确定不同显色药剂的配比，使得测试液在pH值4.6～7.6范围内呈现肉眼可辨的颜色梯度变化，达到高精度测试的需要，可以通过肉眼区分pH值在0.2精度下引起显色药剂的颜色梯度变化，适应于pH值精度高的场所，同时通过加入有机溶剂促进显色剂的溶解，通过加入抗氧剂解决了易氧化、易挥发的问题，通过加入增稠剂解决了易撒漏的问题。通过添加合理配比的抗氧剂、增稠剂及有机溶剂，协同作用，使得产品稳定性高，存储时间长，不易挥发，运输过程中不会撒漏，有利于产品的商品化。1. The test solution of the present invention determines the ratio of different color-developing agents, so that the test solution presents a color gradient change that can be discerned by the naked eye within the range of pH 4.6 to 7.6, which meets the needs of high-precision testing, and can distinguish pH values by the naked eye It causes the color gradient change of the chromogenic agent at a precision of 0.2, and is suitable for places with high pH accuracy. At the same time, the dissolution of the chromogenic agent is promoted by adding an organic solvent, and the problem of easy oxidation and volatilization is solved by adding an antioxidant. Adding a thickener solves the problem of easy leakage. By adding a reasonable ratio of antioxidants, thickeners and organic solvents, the synergistic effect makes the product high in stability, long in storage time, not volatile, and will not leak during transportation, which is conducive to the commercialization of the product.
2.本发明选定果胶、海藻酸、壳聚糖、明胶作为增稠剂，增稠效果明显，用量低，与溶剂亲和力强，可以很好的防止测试液中有机溶剂的挥发和运输过程中的撒漏问题。2. The present invention selects pectin, alginic acid, chitosan, and gelatin as thickeners, which have obvious thickening effect, low dosage, and strong affinity with solvents, which can well prevent the volatilization and transportation process of organic solvents in the test solution The leakage problem in .
3、由于本发明得到的测试液为真溶液，所有成分都完全的溶解在溶剂中，当显色药剂与待测溶液接触时可以立刻显色，显色迅速。3. Since the test solution obtained by the present invention is a true solution, all components are completely dissolved in the solvent, and when the color-developing agent contacts the solution to be tested, it can develop color immediately and rapidly.
4、本发明的测试液使用方便。4. The test solution of the present invention is easy to use.
5、本发明得到的pH值在4.6～7.6范围内的高精度测试液的制备方法，先将有机溶剂、抗氧剂、增稠剂通过制备成混悬溶液，使增稠剂充分溶胀，有利于其快速溶解。该制备方法简单，快速，无需特殊的仪器设备，对生产人员也无需特殊要求，对生产环境也无需特殊条件。5. The preparation method of the high-precision test solution with a pH value obtained in the present invention in the range of 4.6 to 7.6, first prepares an organic solvent, an antioxidant, and a thickener into a suspension solution, so that the thickener is fully swollen, and there is Facilitate its rapid dissolution. The preparation method is simple and fast, does not require special instruments and equipment, does not require special requirements for production personnel, and does not require special conditions for the production environment.
附图说明Description of drawings
图1为本发明的pH值测试液在pH值4.6～7.6范围内显色效果试验结果图。Fig. 1 is a diagram showing the test results of the color development effect of the pH value test solution in the range of pH 4.6 to 7.6 according to the present invention.
具体实施方式detailed description
以下结合具体实施例对本发明作进一步详细说明。The present invention will be described in further detail below in conjunction with specific examples.
实施例1Example 1
取50克丙二醇，加入1克果胶，加入抗坏血酸0.5克，加热搅拌制成混悬液。再将乙氧基黄叱精2克，石蕊3克，溴甲酚紫1克，中性红1克，亚甲基蓝0.5克入上述混悬液中用研钵研磨，搅拌溶解完全后补足蒸馏水到100克，即得成品。经过高温、高湿、光照等加速试验，结果表明该配方稳定性极佳，满足商品化要求。Get 50 grams of propylene glycol, add 1 gram of pectin, add 0.5 grams of ascorbic acid, heat and stir to prepare a suspension. Then put 2 grams of ethoxylated huangchijing, 3 grams of litmus, 1 gram of bromocresol violet, 1 gram of neutral red, and 0.5 grams of methylene blue into the above suspension and grind it with a mortar. After stirring and dissolving completely, add distilled water to 100 grams to get the finished product. After accelerated tests such as high temperature, high humidity, and light, the results show that the formula has excellent stability and meets the requirements for commercialization.
实施例2Example 2
取60克丙酮，加入3克壳聚糖，加入硫代硫酸钠1克，加热搅拌制成混悬液。再将乙氧基黄叱精1克，石蕊2克，溴甲酚紫0.5克，中性红0.5克，亚甲基蓝0.2克加入上述混悬液中用研钵研磨，搅拌溶解完全后补足蒸馏水到100克，即得成品。经过高温、高湿、光照等加速试验，结果表明该配方稳定性极佳，满足商品化要求。Get 60 grams of acetone, add 3 grams of chitosan, add 1 gram of sodium thiosulfate, heat and stir to prepare a suspension. Then add 1 gram of ethoxylated huangchijing, 2 grams of litmus, 0.5 grams of bromocresol purple, 0.5 grams of neutral red, and 0.2 grams of methylene blue into the above suspension and grind it with a mortar. After stirring and dissolving completely, add distilled water to 100 grams to get the finished product. After accelerated tests such as high temperature, high humidity, and light, the results show that the formula has excellent stability and meets the requirements for commercialization.
实施例3Example 3
取300克乙二醇，300克丙二醇，加入5克海藻酸，20克明胶，加入硫代硫酸钠5克，丁基羟基茴香醚5克，加热搅拌制成混悬液。再将乙氧基黄叱精20克，石蕊30克，溴甲酚紫5克，中性红5克，亚甲基蓝2克，加入上述混悬液中使用小型均质机机器研磨，搅拌溶解完全后补足蒸馏水到1000克，分装后，即得成品。经过高温、高湿、光照等加速试验，结果表明该配方稳定性极佳，满足商品化要求。Take 300 grams of ethylene glycol and 300 grams of propylene glycol, add 5 grams of alginic acid, 20 grams of gelatin, add 5 grams of sodium thiosulfate, and 5 grams of butylhydroxyanisole, heat and stir to form a suspension. Then add 20 grams of ethoxylated huangchijing, 30 grams of litmus, 5 grams of bromocresol purple, 5 grams of neutral red, and 2 grams of methylene blue into the above suspension, grind it with a small homogenizer, stir and dissolve completely Finally, make up distilled water to 1000 grams, and after subpackaging, the finished product is obtained. After accelerated tests such as high temperature, high humidity, and light, the results show that the formula has excellent stability and meets the requirements for commercialization.
使用效果试验：Use effect test:
实验1Experiment 1
显色试验：Color test:
所用试剂：在pH值4.6～7.6范围内、pH相差0.2的标准溶液；Reagents used: standard solutions with a pH difference of 0.2 within the range of pH 4.6 to 7.6;
使用测试液的显色效果试验：分别取不同pH值的上述标准溶液2.5ml(用pH值计校准)，滴加一滴本发明实施例1或2或3中的测试液。其显色效果几乎一致，见图1所示，图中玻璃小杯上用黑色记号笔标注出相应溶液的pH值。pH值4.6为红色，pH值6.0为黄色，在pH值4.6-6.0之间为红色逐渐减弱、黄色逐渐增强的不同程度的橙色，pH值6.2突变为黄棕色，pH值6.4为红棕色，pH值6.6为果绿色，pH值7.6为蓝紫色，在pH值6.6-7.6之间绿色逐渐减弱，紫色逐渐增强的不同程度的蓝绿色。The color development effect test using the test solution: take 2.5ml of the above-mentioned standard solutions with different pH values (calibrated with a pH meter), and add a drop of the test solution in Example 1 or 2 or 3 of the present invention dropwise. The color rendering effect is almost the same, as shown in Figure 1, in which the pH value of the corresponding solution is marked on the small glass cup with a black marker. pH value 4.6 is red, pH value 6.0 is yellow, between pH 4.6-6.0, it is different degrees of orange with red gradually weakening and yellow gradually increasing, pH 6.2 suddenly becomes yellowish brown, pH 6.4 is reddish brown, pH The value of 6.6 is fruit green, the pH value of 7.6 is blue-purple, and the green gradually weakens between pH 6.6-7.6, and the purple gradually increases in different degrees of blue-green.
实验2Experiment 2
稳定性试验：按照中华人民共和国药典(2010版)附录要求，将本发明实施例1-实施例3的测试液分别放入密闭透明塑料瓶中，分别存放在60摄氏度，湿度95％，光照4500勒克斯环境下10天，观察测试液稳定性，无任何变化，同时按照实验1操作方法，对不同pH值溶液进行显色，显色无差别。Stability test: according to the requirements of the appendix of the Pharmacopoeia of the People's Republic of China (2010 edition), the test solutions of Embodiment 1-Example 3 of the present invention were respectively put into airtight transparent plastic bottles, stored at 60 degrees Celsius, humidity 95%, light 4500 Under the lux environment for 10 days, the stability of the test solution was observed without any change. At the same time, according to the operation method of Experiment 1, the color development of solutions with different pH values was carried out, and there was no difference in color development.
实验3Experiment 3
防撒漏试验：将本发明实施例1-实施例3的测试液分别放入15ml眼药水滴瓶中，倒置用手指轻按瓶体，发现测试液不易流出；再将装有测试液的滴瓶，放入片剂脆碎度仪中旋转10分钟，也无撒漏现象。同样的测试条件下，如果不加入增稠剂，都会出现渗漏现象，二者形成鲜明对比。Anti-spill test: put the test solution of the embodiment 1 to the embodiment 3 of the present invention into the 15ml eye drops drop bottle respectively, press the bottle body upside down with fingers, and find that the test solution is not easy to flow out; then put the drop bottle containing the test solution bottle, put it into the tablet friability tester and rotate it for 10 minutes, and there was no leakage. Under the same test conditions, if no thickener is added, there will be leakage, and the two are in sharp contrast.
本发明得到的是一种pH值在4.6～7.6范围内的高精度测试液，测试方便，显色迅速，稳定性好，不易撒漏，价格低廉。正常人的肉眼可以轻松辨别出pH值在0.2精度变化时显色药剂颜色的梯度变化，通过添加药用辅料，提高了测试液的溶解稳定性、抗氧能力和粘稠度，以改善其稳定性、易氧化性和易撒漏的不足。适合于实验室外在该pH值变化范围内的快速检验，可用于食品安全、医药检测、环境保护、水质监控、工业生产、刑事化验等需要实验室外快速精确测试待测溶液的pH值的领域。The invention obtains a high-precision test solution with a pH value in the range of 4.6-7.6, which is convenient for testing, rapid in color development, good in stability, difficult to leak and low in price. The naked eye of normal people can easily distinguish the gradient change of the color of the chromogenic agent when the pH value changes with an accuracy of 0.2. By adding pharmaceutical excipients, the dissolution stability, antioxidant capacity and viscosity of the test solution are improved to improve its stability. The deficiencies of resistance, easy oxidation and easy leakage. It is suitable for rapid testing outside the laboratory within the range of the pH value, and can be used for food safety, medical testing, environmental protection, water quality monitoring, industrial production, criminal testing, etc. that require rapid and accurate testing of the pH value of the solution to be tested outside the laboratory field.
以上所述仅是本发明的优选实施方式，应当指出的是，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the protection scope of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410416165.7ACN104237229B (en) | 2014-08-22 | 2014-08-22 | PH value test fluid and preparation method thereof |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410416165.7ACN104237229B (en) | 2014-08-22 | 2014-08-22 | PH value test fluid and preparation method thereof |
| Publication Number | Publication Date |
|---|---|
| CN104237229A CN104237229A (en) | 2014-12-24 |
| CN104237229Btrue CN104237229B (en) | 2016-08-24 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410416165.7AActiveCN104237229B (en) | 2014-08-22 | 2014-08-22 | PH value test fluid and preparation method thereof |
| Country | Link |
|---|---|
| CN (1) | CN104237229B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3075616B1 (en)* | 2017-12-21 | 2022-06-10 | Oreal | METHOD FOR THE TREATMENT OF KERATIN FIBERS USING A DIRECT OXAZONE OR PHENAZINE HALOCHROME DYE, A DEVELOPER AND THEN AN ERASER |
| CN111812086A (en)* | 2020-08-04 | 2020-10-23 | 河南省产品质量监督检验院 | Trisodium trithiocyanate rapid detection test paper and preparation method and detection method thereof |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2605422A1 (en)* | 2005-04-25 | 2006-11-02 | Sgm Biotech, Inc. | Evaluating bacterial lethality of containerized food production |
| CN201016931Y (en)* | 2006-12-06 | 2008-02-06 | 白莉 | pH color matching detecting tube |
| US7883898B2 (en)* | 2007-05-07 | 2011-02-08 | General Electric Company | Method and apparatus for measuring pH of low alkalinity solutions |
| GB0714135D0 (en)* | 2007-07-19 | 2007-08-29 | Univ Bristol | Method |
| CN102788791B (en)* | 2012-08-10 | 2015-06-17 | 青岛农业大学 | Fast determination device for soil acidity and alkalinity |
| CN103033504B (en)* | 2012-12-08 | 2014-10-29 | 杭州特种纸业有限公司 | Preparation method of universal pH test paper |
| Publication number | Publication date |
|---|---|
| CN104237229A (en) | 2014-12-24 |
| Publication | Publication Date | Title |
|---|---|---|
| CN104024852A (en) | Means for detecting oxygen free radicals in human body | |
| CN106324185B (en) | A kind of assay method of Emulsion of UPR acid value | |
| CN108535242A (en) | A kind of fried fast joint detection device and its detection method with oil deterioration | |
| CN104237229B (en) | PH value test fluid and preparation method thereof | |
| CN108776132A (en) | The simple test paper of ammonia and its preparation and assay method in a kind of measurement air | |
| CN101904806B (en) | Method for preparing standard substance for detecting antibiotics in cosmetics | |
| RU2014151372A (en) | USER INTERFACE FOR DEVICE FOR RESEARCH | |
| CN104215479B (en) | A kind of biological test method of quick detection Chinese medicine comprehensive toxicity | |
| JP2011523058A5 (en) | ||
| CN104089947A (en) | Method for detecting chemical components comprising nickel, chromium and manganese of stainless steel | |
| CN105300970B (en) | Total residual chlorine field fast detection method in a kind of water for eliminating reagent blank influence | |
| CN105527308B (en) | Filter disc for XRF element determination, filter disc preparation method, determination box and element determination method | |
| Rohner et al. | Validation of a user-friendly and rapid method for quantifying iodine content of salt | |
| CN104515768A (en) | Tumor specific growth factor detection kit | |
| CN105067611A (en) | Quick test paper for hardness of water | |
| CN103424401B (en) | A kind of biological test method of quick detection houttuynia cordata injection comprehensive toxicity | |
| CN101672794A (en) | Rapid semi-quantitative detection method of phenylenediamine substances | |
| CN109254111A (en) | A kind of detection method and preparation method thereof of Water soluble fertilizer nitrate nitrogen content | |
| CN110823882B (en) | Antifreezing gel state indicating material, application and preparation method thereof | |
| CN105418629B (en) | A kind of Rhodamine Derivatives as pH probes application | |
| CN101672795B (en) | Detection filter paper and application for detecting phenylenediamine substances in cosmetics | |
| CN105987909A (en) | Detection kit for on-site quick detection of chromium ions in water and preparing method | |
| JPH04110620A (en) | Standard sample and instrumental measuring method for saybolt chromaticity of petroleum product using standard sample | |
| CN104020165B (en) | Reagent for measuring lead content of urine and rapid detection method | |
| CN204705418U (en) | A kind of Noctilucent thermometer |
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | Inventor after:Dong Qiwei Inventor before:Zhao Hui Inventor before:Only virtuous virtuous | |
| CB03 | Change of inventor or designer information | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right | Effective date of registration:20170829 Address after:162850 Inner Mongolia Hulun Buir city Dent Department of Nierji town Molidawa Daur autonomous neighborhood 01-348 Patentee after:Dong Qiwei Address before:300134 Beichen District, Tianjin Jin Road East Side Patentee before:Tianjin University Of Commerce | |
| TR01 | Transfer of patent right | Effective date of registration:20181227 Address after:226000 Haimen Economic and Technological Development Zone, Nantong City, Jiangsu Province, No. 999 Guangzhou Road Patentee after:Nantong Construction Engineering Co.,Ltd. Address before:162850 Denteko Residential Committee 01-348, Nierji Town, Molidawadaur Autonomous Banner, Hulunbuir City, Inner Mongolia Patentee before:Dong Qiwei | |
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right | Effective date of registration:20220701 Address after:No. 328, Zhonghua East Road, Sanchang street, Haimen District, Nantong City, Jiangsu Province, 226000 Patentee after:Jiangsu Guanghai inspection and Testing Co.,Ltd. Address before:226000 Haimen Economic and Technological Development Zone, Nantong City, Jiangsu Province, No. 999 Guangzhou Road Patentee before:Nantong Construction Engineering Co.,Ltd. | |
| TR01 | Transfer of patent right |