首页> 外国专利> METHOD FOR MAKING INDICATOR PAPER FOR TOTAL SEMI-QUANTITATIVE DETERMINATION OF NITRITES AND NITRATES IN FRUIT AND VEGETABLE AND IN WATER SOLUTIONS

METHOD FOR MAKING INDICATOR PAPER FOR TOTAL SEMI-QUANTITATIVE DETERMINATION OF NITRITES AND NITRATES IN FRUIT AND VEGETABLE AND IN WATER SOLUTIONS

机译:完全定量测定水果,蔬菜和水溶液中亚硝酸盐和硝酸盐的指示纸的制备方法

摘要

The invention relates to analytical chemistry, in particular to test-methods for reveal and semi-quantitative determination of nitrite- and nitrate-ions. A method for making the indicator paper for express total semi-quantitative determination of nitrites and nitrates in fruit and vegetables and in water solutions is claimed, it is based on use of rivanol as ecologically safe reactant that in acid medium reacts with nitrite-ions with formation of product of reaction dyed in red color. To increase ecological safety the indicator mixture of which indicator paper is made new composition of reactants is used with much lower content of mangan salt, and to increase the performance life acetone solution of citric acid is applied on indicator paper after drying.
机译:本发明涉及分析化学,尤其涉及用于亚硝酸根离子和硝酸根离子的显露和半定量测定的测试方法。要求提供一种用于对水果,蔬菜和水溶液中的亚硝酸盐和硝酸盐进行总半定量测定的指示纸的制备方法,该方法是基于使用利凡诺醇作为生态安全的反应物,在酸性介质中与亚硝酸盐离子发生反应。形成红色染色的反应产物。为了提高生态安全性,使用了由新的反应物组成制成的指示剂混合物,其中锰盐的含量低得多,并且为延长使用寿命,在干燥后将柠檬酸丙酮溶液涂在了指示剂纸上。

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