A method for fast and accurate determination of sulfite, sulfate and thiosulfate in biogas slurry
An accurate determination of sulfite, applied in the field of analytical chemistry, can solve the problems of large interference, poor reproducibility, and long time consumption, and achieve the effect of meeting the detection requirements, high accuracy, and easy operation
Active Publication Date: 2019-09-17
TONGJI UNIV
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Problems solved by technology
However, at present, the reports on sulfate, sulfite, and thiosulfate in biogas slurry samples are mostly concentrated on the general chemical method to determine them separately, which has large interference, long time-consuming, and poor reproducibility.
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Embodiment １
[0038] (1) Reagent preparation
[0039] Eluent: Accurately weigh 16.9548 g of sodium carbonate reagent and 4.2005 g of sodium bicarbonate reagent that have been dried to constant weight, and dilute to 500 ml with ultrapure water to prepare eluent stock solution; take 10 ml of eluent stock solution, 200ml of acetonitrile solution, set the volume to 1000ml, and prepared a eluent containing 3.2mM sodium carbonate, 1.0mM sodium bicarbonate, and 20% acetonitrile; take 10ml eluent stock solution, 200ml acetone solution, and dilute to 1000ml to prepare Eluent containing 3.2mM sodium carbonate, 0.0mM sodium bicarbonate, and 20% acetone;
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The invention relates to a method for quickly and accurately determining sulfite, sulfate and thiosulfate anion in biogas slurry. First SO32-, SO42- and S2O32- single standards are prepared respectively; according to retention time quantification, SO32-, SO42- and S2O32- mixed standards are prepared, a linear equation of concentration and peak area is obtained, and then a sludge sample is pretreated to obtain biogas slurry; the treated biogas slurry passes a 0.22[mu]m polyether sulfone filter membrane, ultrapure water is used for dilution and then ion chromatography is performed, the temperature of a column oven is set as 35 DEG C, the sample size is 20 microliters, the flow velocity is 0.7 ml / min, 3.2 m MNa2CO3 and 1.0m MNa2HCO3 and 20% acetone serve as a leacheate, and concentrations of SO32-, SO42- and S2O32- in the biogas slurry are obtained according to the linear equation. The analysis process of the method is implemented in 30 min, and the method is high in accuracy and good in reproducibility and provides technical means for determining material flow containing a sulfur compound.
Description
technical field [0001] The invention relates to a method for quantitatively measuring the contents of sulfite, sulfate and thiosulfate in sludge biogas samples, in particular to a method for rapidly and accurately measuring sulfite, sulfate and thiosulfate in biogas slurry , belonging to the field of analytical chemistry. Background technique [0002] In recent years, the stench problem caused by sewage treatment plants has attracted more and more attention. Among them, hydrogen sulfide generated during anaerobic digestion plays an important role in causing malodors, and it can cause important adverse effects on human health. Studies have shown that the sulfate reduction pathway in the anaerobic digestion process is an important way to generate hydrogen sulfide. In an anaerobic environment, under the action of sulfate-reducing bacteria, sulfate undergoes a series of enzymatic reactions to generate important intermediate products such as sulfite and thiosulfate, which are f...
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IPC IPC(8): G01N30/02
Inventor 董滨熊南安卢怡清王有晴于晓庆夏兆辉孟金凤戴晓虎
Owner TONGJI UNIV