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After treating it with cadmium column nitrate in water sample is reduced to nitrite and measured using the sulphanilamide method. Total nitrite and reduced nitrate is detected from the nitrite available.APHA(2017,ISBN:9780875532875).
Nitrate(Conc_std_sol, E1c, E1_sc, E0c, EB1c, E1, E1_s, E0, EB1)
Nitrate (micro gm/L)
Concentration of standard solution
Absorbance of standard with reagent
Absorbance of sample with reagent
Absorbance of sample without NEED reagent
Absorbance of distilled water and reagent
Absorbance of standard with reagent after passing through cadmium column
Absorbance of sample with reagent after passing through cadmium column
Absorbance of sample without NEED reagent after passing through cadmium column
Absorbance of distilled water and reagent after passing through cadmium column
APHA, 2017. Standard methods for examination of water and wastewater, 23rd edn. APHA, AWWA, WPCF, Washington
Nitrate(1000, 0.30, 0.320, 0.1, 0.05, 0.30, 0.220, 0.1, 0.05)
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