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Spectrophotometric Determination of Trace Nitrite with Methyl Blue

XI Xiao-lan

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Abstract

Objective: To explore a new spectrophotometric method for the determination of trace nitrite. Method: Based on the nitrosation reaction of methyl blue with nitrite in diluted hydrochloric acid medium, a new method was developed. Results: The linear range for the determination was 0～50mg/L NO_2~- . Most of coexistent ions did not interfere the determination of NO_2~-. When applied this method to the determination of nitrite in water samples, satisfactory results were achieved. Conclusion: The development of this method is successful.

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What this paper is about

Objective: To explore a new spectrophotometric method for the determination of trace nitrite. Method: Based on the nitrosation reaction of methyl blue with nitrite in diluted hydrochloric acid medium, a new method was developed. Results: The linear range for the determination was 0～50mg/L NO_2~- . Most of coexistent ions did not interfere the determination of NO_2~-. When applied this method to the determination of nitrite in water samples, satisfactory results were achieved. Conclusion: The development of this method is successful.

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Available abstract

Objective: To explore a new spectrophotometric method for the determination of trace nitrite. Method: Based on the nitrosation reaction of methyl blue with nitrite in diluted hydrochloric acid medium, a new method was developed. Results: The linear range for the determination was 0～50mg/L NO_2~- . Most of coexistent ions did not interfere the determination of NO_2~-. When applied this method to the determination of nitrite in water samples, satisfactory results were achieved. Conclusion: The development of this method is successful.

Key concepts: Nitrite, Hydrochloric acid, Chemistry, TRACE (psycholinguistics), Trace Amounts, Linear range, Nitrosation, Chromatography

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