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
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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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