Method for analyzing total phosphorus in industrial sewage sample

A technology for industrial sewage and samples, applied in the field of analyzing samples, can solve the problems of complicated operation, not simple enough operation, cumbersome operation process, etc., and achieve the effect of simple operation process, lower inspection cost, and improved safety.

Inactive Publication Date: 2013-03-27
HEFEI XINGYU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing methods or operations are complicated, safety needs to be improved, or operations are not simple enough
Both need to be digested under high temperature and high pressure conditions, and the digestion temperature, time and reagents all have a great influe...

Method used

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  • Method for analyzing total phosphorus in industrial sewage sample
  • Method for analyzing total phosphorus in industrial sewage sample
  • Method for analyzing total phosphorus in industrial sewage sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The first step is to dilute the sewage sample to an appropriate concentration, pipette 8ml of the diluted sample,

[0019] In the second step, add 1ml of potassium persulfate solution, shake well, cover and heat at 120°C under normal pressure for 30 minutes, take out the water and cool to room temperature,

[0020] The third step is to add 0.3ml of 10% ascorbic acid solution, then add 0.3ml of molybdate solution, shake well, let it stand for 15 minutes, pour it into a cuvette, and use water as a reference at a wavelength of 710nm to measure Absorbance;

[0021] After deducting the absorbance of the blank test, check the phosphorus content from the working curve, phosphate content = phosphorus content found on the working curve / water sample volume, and the units of phosphorus content and water sample volume are μg / mL and mL respectively.

[0022] For the potassium persulfate solution described in the second step, 5 g of potassium persulfate was dissolved in dry water an...

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Abstract

The invention discloses a method for analyzing total phosphorus in an industrial sewage sample, which comprises the following steps of: diluting a sewage sample to a proper concentration; fetching 8ml of the diluted sample, adding 1ml of potassium persulfate solution, and shaking uniformly; covering with a cover under normal pressure at 120 DEG C and heating for 30 minutes; taking out the product and performing water cooling to room temperature; adding 0.3ml of 10% ascorbic acid solution, and adding 0.3ml of molybdate solution; shaking uniformly, and standing for 15 minutes; pouring the product into a cuvette; measuring the absorbance by taking water as a reference in a wavelength of 710nm; and inquiring the content of phosphorus on a working curve after deducting the absorbance of a blank test, wherein the content of phosphate is the phosphorus content inquired from the working curve divided by the volume of the water sample. The method disclosed by the invention overcomes the shortcomings of the prior art, and measures the content of total phosphorus through ultraviolet visible spectrophotometer equipment under normal pressure according to the principle of an ammonium molybdate spectrophotometric method for measuring total phosphorus; and moreover, the operation process of the method is simple, the inspection cost is lowered, the safety is improved, and the result is reliable.

Description

technical field [0001] The invention relates to the technical field of analyzing samples, in particular to a method for analyzing total phosphorus in industrial sewage samples. Background technique [0002] The determination and analysis of total phosphorus plays an important role in industry. For example, total phosphorus can be used to reasonably control the effect of industrial circulating water treatment and monitor the efficiency of sewage treatment. In industrial production, the treated sewage needs to detect its total phosphorus content frequently to control it to meet the discharge standard. The existing method or operation is complicated, the safety needs to be improved, or the operation is not simple enough. Both need to be digested under high temperature and high pressure conditions, and the digestion temperature, time and reagents all have a great influence on the measurement results, and the operation process is cumbersome, which brings great inconvenience to t...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 唐昱琛赵国霞范红
Owner HEFEI XINGYU CHEM
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