The content for Jianghai high-purity ammonium chloride is usually above 99.8%. With its unique unsaturated crystallization process and strict quality control, it has become a long-term partner of many domestic food ,drug and analytical reagent manufacturers.
The analysis methods of ammonium chloride mainly include formaldehyde method, distillation titration method and silver nitrate method.
The formaldehyde method and the distillation titration method are similar in principle to the determination of ammonium chloride content by measuring the nitrogen content in the sample.
The silver nitrate method is to determine the content of ammonium chloride in the sample by direct titration of silver nitrate, which belongs to the direct titration method.
In general, if the product purity is very high (≥99.8%) and the three methods are used to measure, the results are not much different under the condition that the level of the analysts is consistent and the calibration liquid is accurate. Theoretically, the results of the first two methods are slightly lower but within the error range because of the indirect measurement.
If the sample purity is very general, such as industrial grade ammonium chloride, the results of these three methods are very different. As we all know, as the raw materials of ammonium chloride in China are produced by the combined alkaline method, it is destined that the main impurities in ammonium chloride are chlorides such as sodium chloride, potassium chloride, and calcium chloride, while nitrogen-containing impurities are basically absent. At this time, if the silver nitrate method is used to determine the chlorine element, it means that all impurities containing chlorine are considered as ammonium chloride and included in the purity calculation, the purity of ammonium chloride is artificially increased, and it is easy to appear the content of more than 100% .
Some manufacturers in the market are limited by their own purification technology capabilities, so it is really undesirable to use the analytical methods to improve the purity of products.
Hunan Jianghai is the drafting unit of the national standard for food-grade ammonium chloride. Since its establishment 20 years ago, the company has only focused on ammonium chloride, only ammonium chloride as a product and a set of purification process , which fundamentally eliminates the introduction of other impurities and ensures the quality of high-purity ammonium chloride.