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Method for synchronously determining content of trihalomethane and haloacetic acid in drinking water

A technology of trihalomethane and haloacetic acid, which is applied in the field of determining the content of trihalomethane and haloacetic acid in water, can solve the problems of time-consuming and laborious cost, inability to synchronize pretreatment of trihalomethane and haloacetic acid, etc.

Active Publication Date: 2016-06-29
黑龙江省工研龙创环境产业集团有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the prior art cannot carry out synchronous pretreatment to trihalomethanes and haloacetic acids in drinking water, and the problems of time-consuming and high cost of synchronous measurement and separate determination of trihalomethanes and haloacetic acids in drinking water, To provide a method for simultaneous determination of trihalomethanes and haloacetic acids in drinking water

Method used

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  • Method for synchronously determining content of trihalomethane and haloacetic acid in drinking water
  • Method for synchronously determining content of trihalomethane and haloacetic acid in drinking water
  • Method for synchronously determining content of trihalomethane and haloacetic acid in drinking water

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specific Embodiment approach 1

[0126] Specific embodiment one: a kind of method for synchronous determination of trihalomethanes and haloacetic acid content in drinking water is to be finished according to the following steps:

[0127] 1. Acidify the water sample to be tested:

[0128] Put the water sample to be tested in a sterile carbon-free brown glass bottle with a polytetrafluoroethylene cover, and then add concentrated sulfuric acid with a mass fraction of 96% to 98% to the water sample to be tested to obtain the acidified sample. Test water samples;

[0129] The volume ratio of the water sample to be tested described in step 1 to the brown glass bottle with a polytetrafluoroethylene cover aseptic and carbon-free is 1:(2~2.5);

[0130] The volume ratio of the water sample to be tested and the concentrated sulfuric acid with a mass fraction of 96% to 98% described in step 1 is 10:(1 to 1.5);

[0131] 2. Enhance the polarity of the water sample to be tested:

[0132] Add burning anhydrous sodium sulf...

specific Embodiment approach 2

[0241] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the extraction agent described in step 3 is methyl tert-butyl ether. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0242] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the volume ratio of the water sample to be tested described in step one and the brown glass bottle with a polytetrafluoroethylene cover aseptic and carbon-free It is 1:2. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for synchronously determining the content of trihalomethane and haloacetic acid in drinking water, relates to a method for determining the content of trihalomethane and haloacetic acid in the drinking water, and aims at solving the problems that in the prior art, synchronous pretreatment cannot be performed on trihalomethane and haloacetic acid in the drinking water, and time and labor are consumed and the cost is high when trihalomethane and haloacetic acid in the drinking water are synchronously determined and separately determined. The method comprises the steps that 1, a water sample to be determined is acidized; 2, the polarity of the water sample to be determined is enhanced; 3, extracting is performed; 4, deriving is performed; 5, neutralizing is performed; 6, the peak area of trihalomethane in the water sample to be determined is determined; 7, the peak area of haloacetic acid in the water sample to be determined is determined; 8, a standard curve is drawn; 9, the concentration of trihalomethane in the water sample to be determined is calculated; 10, the concentration of haloacetic acid in the water sample to be determined is calculated. The method for synchronously determining the content of trihalomethane and haloacetic acid in the drinking water can be achieved.

Description

technical field [0001] The invention relates to a method for measuring the contents of trihalomethanes and haloacetic acids in water. Background technique [0002] Disinfection is an important part of drinking water treatment. It plays a vital role in eliminating pathogens in water, ensuring water supply safety, and preventing the outbreak of water-borne infectious diseases. However, in the process of drinking water disinfection, a series of "three harmful" disinfection by-products will inevitably be produced, such as trihalomethanes, haloacetic acids, etc., which endanger the health of residents. For this reason, my country has imposed strict restrictions on the concentration of disinfection by-products in drinking water. [0003] The detection of trihalomethanes and haloacetic acids can be roughly divided into two steps, that is, the pretreatment method and the instrument analysis method. The methods used in the pretreatment include liquid-liquid extraction, gas stripping...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06G01N2030/025G01N2030/062G01N2030/067
Inventor 黄睿刘志泉崔福义闫博引
Owner 黑龙江省工研龙创环境产业集团有限公司
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