Automatic analysis method for seawater phenols compounds

A phenolic compound, automatic analysis technology, applied in material analysis by observing the effect on chemical indicators, analysis by chemical reaction of materials, color/spectral property measurement, etc., can solve the problem of poor sensitivity and accuracy, labor High intensity, cumbersome operation and other problems, to achieve the effect of ensuring sensitivity and accuracy, good reproducibility, and good precision

Inactive Publication Date: 2010-05-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tests have shown that the disadvantage of this method is that it is difficult to overcome the interference of changes in seawater salinity, and when used for the determination of phenolic compounds in seawater, the sensitivity and accuracy are poor
[0004] Regarding the determination of phenolic compounds in seawater, my country's national standard (GB17378.4-1998) adopts the 4-aminoantipyrine spectrophotometric method, but this standard method is a manual analysis method, and sampling, sample introduction and data processing all rely on Manual operation is not only cumbersome and labor-intensive, but also easily introduces human error

Method used

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  • Automatic analysis method for seawater phenols compounds
  • Automatic analysis method for seawater phenols compounds
  • Automatic analysis method for seawater phenols compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the present embodiment, the salinity of the tested seawater sample is 30, and its analysis steps are as follows:

[0029] 1. Preparation of standard samples

[0030] (1) phenol is dissolved in deionized water, is mixed with the mother liquor of phenol concentration 1000mg / L;

[0031] (2) Dilute the mother liquor with 3.09% (w / v) NaCl aqueous solution to prepare a series of standard samples. In each standard sample, the concentration of phenol is 4 μg / L, 16 μg / L, 32 μg / L, 64 μg / L, and 120 μg / L, 240μg / L.

[0032] 2. Oxidizing solution R 1 preparation

[0033] Potassium ferricyanide (K 3 Fe(CN) 6 ) was dissolved in deionized water, and then ammonia water was added to prepare the weight / volume percentage of potassium ferricyanide as 0.1%, and the concentration of ammonia water as 1.0×10 -2 mol / L aqueous solution as the oxidation solution R 1 .

[0034] 3. Chromogenic solution R 2 preparation

[0035] Dissolve 4-aminoantipyrine with deionized water, and prepare...

Embodiment 2

[0046] In the present embodiment, the salinity of the tested seawater sample is 20, and its analysis steps are as follows:

[0047] 1. Preparation of standard samples

[0048] (1) phenol is dissolved in deionized water, is mixed with the mother liquor of phenol concentration 1000mg / L;

[0049] (2) Dilute the mother liquor with 2.06% (w / v) NaCl aqueous solution to prepare a series of standard samples. In each standard sample, the concentration of phenol is 4 μg / L, 16 μg / L, 32 μg / L, 64 μg / L, and 120 μg / L, 240μg / L.

[0050] 2. Oxidizing solution R 1 preparation

[0051] Potassium ferricyanide (K 3 Fe(CN) 6 ) was dissolved in deionized water, then ammonia water was added, and the weight / volume percentage of being mixed with potassium ferricyanide was 0.08%, and the concentration of ammonia water was 0.8×10 -2 mol / L aqueous solution as the oxidation solution R 1 .

[0052] 3. Chromogenic solution R 2 preparation

[0053] Dissolve 4-aminoantipyrine with deionized water, a...

Embodiment 3

[0064] In the present embodiment, the salinity of the tested seawater sample is 15, and its analysis steps are as follows:

[0065] 1. Preparation of standard samples

[0066] (1) phenol is dissolved in deionized water, is mixed with the mother liquor of phenol concentration 1000mg / L;

[0067] (2) Dilute the mother liquor with 1.5% (w / v) NaCl aqueous solution to prepare a series of standard samples. In each standard sample, the concentration of phenol is 4 μg / L, 16 μg / L, 32 μg / L, 64 μg / L, and 120 μg / L, 240μg / L.

[0068] 2. Oxidizing solution R 1 preparation

[0069] Potassium ferricyanide (K 3 Fe(CN) 6 ) was dissolved in deionized water, and then ammonia water was added to prepare potassium ferricyanide with a weight / volume percentage of 0.20%, and a concentration of ammonia water of 2.0×10 -2 mol / L aqueous solution as the oxidation solution R 1 .

[0070] 3. Chromogenic solution R 2 preparation

[0071] Dissolve 4-aminoantipyrine with deionized water, and prepare a...

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Abstract

The invention discloses a method for analyzing automatically phenol compounds in the seawater. The invention adopts a method which combines reverse reference flow injection analysis and spectral photometric tests. Technical scheme is that oxidation solution R1 is iron potassium cyanide-ammonia water solution, colorimetric solution R2 is 4-aminoantipyrine water solution, and R ref is de-ionized water. In analyzing testing flow circuit, a sample or a specimen S is entered into an optical circulating pool after the sample or the specimen S is mixed with the oxidation solution R1 and the referencefluid R ref, produced baselines are mapped, simultaneously, the colorimetric solution R2 is entered into a sampling ring through a sampling valve to fill the sampling ring fully. In the analyzing testing flow circuit, the sample or the specimen S is mixed with the oxidation solution R1 and the colorimetric solution R2, a condensation reaction occurs, colored materials are produced, the mixed liquid with colored materials is entered into the optical circulating pool, produced spectrograms are mapped, and thereby quantity of the phenol compounds in the sample can be calculated out through comparing the mapped sampling spectrograms with standard spectrograms.

Description

technical field [0001] The invention belongs to a detection and analysis method for phenolic compounds in water samples, in particular to an automatic analysis method for phenolic compounds in seawater. Background technique [0002] Phenolic compounds in water can be divided into volatile phenols and non-volatile phenols according to whether they can be evaporated together with water vapor. It is generally believed that phenolic compounds with a boiling point below 230°C are volatile phenols, and phenolic compounds with a boiling point above 230°C are non-volatile phenols. Phenolic compounds are a kind of cell protoplasm poison, and its toxic effect is to chemically react with the protein in the cell protoplasm to form denatured protein and make the cell lose its activity. Phenolic compounds are a class of major pollutants in the environment, and they are also common pollutants in seawater. High concentrations of phenols can inhibit the growth and reproduction of microorgan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78G01N21/25
Inventor 张新申蒋小萍
Owner SICHUAN UNIV
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