Method for detecting elemental phosphorus content in industrial wastewater

A detection method and technology for industrial wastewater, applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problems of technical defects, long time, loss of elemental phosphorus, etc., Achieve the effect of small blank value, low cost and simple operation

Inactive Publication Date: 2020-01-03
HUBEI XINGRUI SILICON MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the sample needs to be heated and oxidized at high temperature during the processing process, it not only takes a long time, but also the sample may cause the loss of elemental phosphorus (phosphorus will spontaneously ignite when it leaves the water) during the processing process, and there are technical flaws

Method used

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  • Method for detecting elemental phosphorus content in industrial wastewater
  • Method for detecting elemental phosphorus content in industrial wastewater
  • Method for detecting elemental phosphorus content in industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Extraction: Take 10g sample (known to contain 8ug elemental phosphorus), put it in a 500mL separatory funnel filled with 15ml benzene, add about 200mL water, cover tightly, shake for 2 minutes, and discard the water after standing for stratification phase, then add 200mL of water, repeat the operation until there are no chloride ions and phosphate ions in the water phase (take 5mL of the water phase in a 5mL beaker, add 1 drop of 1mol / L silver nitrate solution, no white precipitate or turbidity Yes, if yes, continue to repeat).

[0043] Test: Put the extracted benzene solution in a 25mL volumetric flask, add 1ml phosphorus standard solution (concentration 0.02mg / ml), 4.0mL anhydrous methanol, dilute to the mark with benzene, and shake well. Add 1 drop of silver nitrate solution, shake vigorously for 10 seconds, stand still for 8 minutes, at 520nm, use a 1cm cuvette, adjust the zero point of the spectrophotometer with the standard colorimetric solution added with 0.0mL p...

Embodiment 2

[0046] Extraction: Take 8g of sample (known to contain 6ug elemental phosphorus), put it in a 500mL separatory funnel filled with 15ml of benzene, add about 200mL of water, cover tightly, shake for 2 minutes, and discard the water after standing for stratification phase, then add 200mL of water, repeat the operation until there are no chloride ions and phosphate ions in the water phase (take 5mL of the water phase in a 5mL beaker, add 1 drop of 1mol / L silver nitrate solution, no white precipitate or turbidity Yes, if yes, continue to repeat).

[0047]Test: Put the extracted benzene solution in a 25mL volumetric flask, add 2ml phosphorus standard solution (concentration 0.02mg / ml), 4.0mL anhydrous methanol, dilute to the mark with benzene, and shake well. Add 1 drop of silver nitrate solution, shake vigorously for 10 seconds, stand still for 8 minutes, at 520nm, use a 1cm cuvette, adjust the zero point of the spectrophotometer with the standard colorimetric solution added with ...

Embodiment 3

[0050] Extraction: Take 8g of sample (known to contain 6ug elemental phosphorus), put it in a 500mL separatory funnel filled with 15ml of benzene, add about 200mL of water, cover tightly, shake for 2 minutes, and discard the water after standing for stratification phase, then add 200mL of water, repeat the operation until there are no chloride ions and phosphate ions in the water phase (take 5mL of the water phase in a 5mL beaker, add 1 drop of 1mol / L silver nitrate solution, no white precipitate or turbidity Yes, if yes, continue to repeat).

[0051] Test: Put the extracted benzene solution in a 25mL volumetric flask, add 3ml phosphorus standard solution (concentration 0.02mg / ml), 4.0mL anhydrous methanol, dilute to the mark with benzene, and shake well. Add 1 drop of silver nitrate solution, shake vigorously for 10 seconds, stand still for 8 minutes, at 520nm, use a 1cm cuvette, adjust the zero point of the spectrophotometer with the standard colorimetric solution added with...

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Abstract

The invention relates to a method for detecting elemental phosphorus content in industrial wastewater. The method for detecting the elemental phosphorus content in the industrial wastewater comprisesthe steps that the industrial wastewater containing elemental phosphorus is extracted with an organic solvent (benzene), and the elemental phosphorus is collected in extract liquor (benzene); and an appropriate amount of the extract liquor is sucked, a fixed amount of anhydrous methanol and a small amount of silver nitrate are added, the precipitated silver is evenly distributed in a benzene-methanol-water system, and the elemental phosphorus content in the wastewater is determined by spectrophotometer colorimetry. A extraction-spectrophotometry method is adopted to determine the elemental phosphorus content in the industrial wastewater, and the method for detecting the elemental phosphorus content in the industrial wastewater is simple to operate and relatively short in time; a spectrophotometer is used for detecting, a blank value is small, and the detection accuracy can reach 0.01 ppm, so that the method for detecting the elemental phosphorus content in the industrial wastewater ismore conducive to measuring the low-content element phosphorus. An adding standard recovery experiment verifies that the recovery rate is 97% or above, and the experimental result is accurate and reliable.

Description

technical field [0001] The invention relates to a method for detecting elemental phosphorus content in industrial wastewater, belonging to the technical field of environmental protection. Background technique [0002] Elemental phosphorus is flammable and highly toxic, but it is extremely stable in water and can stay in the natural environment for a long time without being oxidized. It has a certain degree of toxicity to aquatic organisms such as fish and algae, and is directly or indirectly eaten by the human body. , resulting in adverse consequences. In recent years, the supervision and inspection of environmental protection issues by governments at all levels has become increasingly strict and normalized, which has put forward higher requirements for enterprises' ability to treat industrial wastes in a harmless manner. Phosphorus-containing production enterprises need to establish a set of quantitative detection and evaluation methods for elemental phosphorus content in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 龚兆鸿
Owner HUBEI XINGRUI SILICON MATERIAL CO LTD
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