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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
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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
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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.
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