Automatic analysis method for aniline of water sample
An automatic analysis and medium aniline technology, applied in the direction of material analysis by observing the influence of chemical indicators, analysis by making materials undergo chemical reactions, color/spectral characteristic measurement, etc., to achieve fewer flow paths, save chemical reagents, The effect of saving reagents
Inactive Publication Date: 2009-08-05
SICHUAN UNIV
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Although the above methods can realize the detection and analysis of aniline, each method mainly relies on manual operation.
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[0016] 1. Preparation of standard samples
[0017] (1) Aniline is dissolved in the sulfuric acid aqueous solution of 0.05mol / L, is mixed with the mother liquor of aniline concentration 10mg / L, sulfuric acid concentration 0.05mol / L;
[0018] (2) Dilute the mother liquor with 0.05mol / L sulfuric acid aqueous solution and prepare a series of standard samples. In each standard sample, the concentration of aniline is 0.005mg / L, 0.02mg / L, 0.10mg / L, 0.40mg / L respectively , 0.80mg / L, 1.60mg / L, 2.00mg / L.
[0019] 2. Preparation of reaction solution R1
[0020] Dissolve sodium nitrite in deionized water, then add H 2 SO 4 , prepared into a sodium nitrite concentration of 3.0×10 -2 mol / L, H 2 SO 4 The concentration is 1.2×10 -2 mol / L aqueous solution as the reaction solution R1.
[0021] 3. Preparation of chromogenic solution R2
[0022] Naphthol is dissolved with a small amount of absolute ethanol (the amount of ethanol is not strictly required, as long as it can completely diss...
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Abstract
An automatic analysis method for aniline in a water sample, the driving solution C is deionized water or distilled water, the reaction solution R1 is sodium nitrite-H2SO4 aqueous solution, the chromogenic solution R2 is a methyl naphthol-NaOH aqueous solution; the reaction solution R1 is passed through the reaction solution The flow path enters the analysis and detection flow path, the push liquid C enters the analysis and detection flow path through the push liquid flow path and the sampling valve, and the chromogenic liquid R2 enters the analysis and detection flow path through the chromogenic liquid flow path. In the analysis and detection flow path, the reaction Solution R1 mixed with pusher solution C and chromogenic solution R2 enters the optical flow cell to generate a baseline to be measured; the standard sample or sample S enters the analysis and detection flow path through the sample flow path, and is pushed by the pusher solution C into the analysis and detection flow path. The reaction liquid R1 in the flow path is mixed and undergoes a diazotization reaction, and then mixed with the chromogenic liquid R2 entering the analysis and detection flow path and reacts to form a colored substance. The above-mentioned mixed liquid containing the colored substance enters the optical flow cell to produce a spectrum surveying and mapping.
Description
technical field [0001] The invention belongs to a detection and analysis method for aniline, in particular to an automatic analysis method for aniline in industrial waste water. Background technique [0002] Aniline is not only an important chemical raw material, but also a highly toxic substance. Entering the human body through inhalation and absorption can cause headaches, dizziness, fatigue, memory loss, shortness of breath and other symptoms, and even suffocation to death. Long-term exposure to aniline can also cause liver cancer or bladder cancer. [0003] In the prior art, naphthalene ethylenediamine spectrophotometry is mostly used to detect aniline. This method has strict requirements on the temperature of color development, and the chromaticity of water samples has an impact on the measurement results, and the analysis speed is slow. In addition, there are electrochemical analysis, fluorescence photometry, ultraviolet photometry, catalytic kinetics and other method...
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IPC IPC(8): G01N21/78G01N21/27
Inventor 张新申黄进
Owner SICHUAN UNIV