SIMPLIFIED METHOD FOR ANALYSIS OF NITRATE AND NITRITE IN THE FIELD, WHICH IS APPLIED TO ANALYSIS OF NITRATE AND NITRITE IN TAP WATER AND FRESH WATER

摘要

Purpose: providing a simplified method of the analysis for NO3-N and NO2-N, to simply and easily analyze NO3-N and NO2-N in the field, is applied to the analysis of nitrate and the nitrite in tap water and fresh water. Construction: analysis of the method for nitrite for producing powder reagent includes mixed powder reagent, it includes P-aminobenzene-sulfonamide, N-(1- naphthalenes) ethylenediamine dihydrochloride, hydrogen chlorate's (phosphate), with the buffer selected from Li2SO4, Na2SO4, potassium sulfate, magnesium sulfate or calcium sulfate, for adjusting the pH of a sample to pH 2.5 to 3.5. Analysis of the method for nitrate for producing powder reagent includes mixed powder reagent, it includes P-aminobenzene-sulfonamide, N-(1- naphthalenes) ethylenediamine dihydrochloride, hydrogen chlorate's (phosphate), buffer selected from Li2SO4, Na2SO4, potassium sulfate, magnesium sulfate or calcium sulfate are used to adjust the pH of a sample to pH 2.5 to 3.5, cadmium powder and sulfanilic acid. Analysis of the simplified method for NO3-N and NO2-N includes the following steps:: the analysis of insertion powdered reagents nitrate and nitrite enter the analysis tool that container preparation one simplifies; A sample is introduced to simplified analysis tool; Moving back for measurement external member is dizzy.