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2004•Chinese Journal of Spectroscopy LaboratoryRequires access

Determination of Trace Nitrite with RP-Flow Injection-Catalytic Spectrophotometry

Gao Zong

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Abstract

The amount of nitrite in river was determined by RP-flow injection-catalytic spectrophotometry based on the catalytic color fading reaction of potassium bromate with carminic acid by nitrite in acidic media.The Experiment conditions were optimized.With 0.14mol/L of KBrO 3,3.2×10 -4 mol/L of carninic acid and 1.4mol/L of H 2SO 4 at 25℃,the detection limit for nitrite is 0.7ng/mL in linear range of 1—10ng/mL.The method was applied to the determination of trace nitrite in river water with satisfactory results.

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The amount of nitrite in river was determined by RP-flow injection-catalytic spectrophotometry based on the catalytic color fading reaction of potassium bromate with carminic acid by nitrite in acidic media.The Experiment conditions were optimized.With 0.14mol/L of KBrO 3,3.2×10 -4 mol/L of carninic acid and 1.4mol/L of H 2SO 4 at 25℃,the detection limit for nitrite is 0.7ng/mL in linear range of 1—10ng/mL.The method was applied to the determination of trace nitrite in river water with satisfactory results.

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Available abstract

The amount of nitrite in river was determined by RP-flow injection-catalytic spectrophotometry based on the catalytic color fading reaction of potassium bromate with carminic acid by nitrite in acidic media.The Experiment conditions were optimized.With 0.14mol/L of KBrO 3,3.2×10 -4 mol/L of carninic acid and 1.4mol/L of H 2SO 4 at 25℃,the detection limit for nitrite is 0.7ng/mL in linear range of 1—10ng/mL.The method was applied to the determination of trace nitrite in river water with satisfactory results.

Key concepts: Potassium bromate, Nitrite, Spectrophotometry, Chemistry, Detection limit, Catalysis, Linear range, Bromate

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