A Spectrophotometric Flow Injection Method for Determination of Ultratrace Amounts of Phenylhydrazine by Its Inhibition Effect on the Reaction of Thionin and Nitrite

<table>Proposed FI manifolds: R<sub>1</sub>, sulfuric acid; R<sub>2</sub>, sodium nitrite; R<sub>3</sub>, thionin; PP, peristaltic pump; MC<sub>1</sub>, mixing coil no. 1; MC<sub>2</sub>, mixing coil no. 2; D, detector; R, recorder; W, waste.</table>

Journal of Chemistry

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Figure 2: A Spectrophotometric Flow Injection Method for Determination of Ultratrace Amounts of Phenylhydrazine by Its Inhibition Effect on the Reaction of Thionin and Nitrite 

Figure 2 | A Spectrophotometric Flow Injection Method for Determination of Ultratrace Amounts of Phenylhydrazine by Its Inhibition Effect on the Reaction of Thionin and Nitrite 