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An analytical method for the detection of 10 highly toxic disinfection by-products in drinking water

A technology of disinfection by-products and analysis methods, which is applied in the fields of municipal water supply and drainage and environmental engineering, can solve problems such as inability to analyze, and achieve the effects of saving manpower and time, avoiding peak and tailing, and convenient sample testing

Inactive Publication Date: 2015-10-21
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method can only quickly analyze dichloroacetonitrile, and cannot analyze its content for other DBPs

Method used

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  • An analytical method for the detection of 10 highly toxic disinfection by-products in drinking water
  • An analytical method for the detection of 10 highly toxic disinfection by-products in drinking water
  • An analytical method for the detection of 10 highly toxic disinfection by-products in drinking water

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] An analytical method for the detection of 10 highly toxic disinfection by-products in drinking water, such as figure 1 As shown, there are three parts including sample pretreatment, instrument condition optimization and operation determination.

[0059] Sample pretreatment includes the selection of the optimal pH value of the water sample and the determination of the operating parameters of the P&T instrument.

[0060] The optimization of instrument conditions also includes the determination of the optimum injection volume and the optimum temperature of the injection port.

[0061] Operational determination also includes determination of working curve, determination of detection limit and determination limit.

[0062] Specific steps are as follows:

[0063] 1 Sample pretreatment

[0064] 1.1 Selection of optimal pH value

[0065] The test is carried out in a flask on a constant temperature magnetic stirrer in the dark, and a certain amount of standard sample is adde...

Embodiment 2

[0091] An analytical method for the detection of 10 highly toxic disinfection by-products in drinking water. The sample is pretreated by purge and trap (P&T), and then analyzed by gas chromatography / mass spectrometry. According to the analysis chromatogram of the sample And the standard working curve of 10 kinds of disinfection by-products to determine the content of 10 kinds of disinfection by-products in the sample, wherein these 10 kinds of disinfection by-products are chloroform, monochlorodibromomethane, dichloromonobromomethane, tribromomethane, dichloronitrate Methyl methane, chloropicrin, dichloroacetone, trichloroacetone, dichloroacetonitrile and trichloroacetonitrile, the method specifically comprises the following steps:

[0092] (1) Adjust the pH of the sample to within the range of 4.5 to 5.0;

[0093] (2) Determine the operating parameters of the purge and trap instrument;

[0094] (3) Determine the operating parameters of the gas chromatograph / mass spectrometer...

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Abstract

The invention relates to an analysis method for detecting ten high-toxic disinfection byproducts in drinking water. The method comprises the steps of pretreating a sample with a purging and trapping device (P&T), then allowing the sample to enter a gas chromatograph-mass spectrometer (GC / MS) for analysis, and determining contents of the ten disinfection byproducts in the sample according to an analysis chromatogram of the sample and standard working curves of the ten disinfection byproducts. Compared with the prior art, the method adopts the purging and trapping device to gather the disinfection byproducts (DBPs) in the water, and determines instrument parameter conditions; reagents such as salt and an extraction agent are not required to be used; an experimenter is prevented from being directly contacted with toxic and harmful organic solvents; simultaneously, the sample detection time is saved; the sample detection cost is lowered; the GC / MS is adopted for measurement, and the detailed instrument parameter conditions are determined, so that phenomena such as peaking and trailing of the ten DBPs can be avoided; the normal peaking of the DBPs is ensured; and a maximum detection limit (MDL) and a smaller relative standard deviation (RSD) can be obtained.

Description

technical field [0001] The invention belongs to the technical field of municipal water supply and drainage and environmental engineering, and relates to water quality detection and analysis technology, in particular to an analysis method for detecting 10 kinds of highly toxic disinfection by-products in drinking water. Background technique [0002] Since the 1970s, researchers have found that after chlorine disinfection, factory water often produces some harmful by-products, such as trihalomethanes (THMs), haloacetic acids (HAAs), haloacetonitriles (HANs), and halogenated furans Ketone (MX), etc., produce bromate after ozone disinfection, and produce chlorite and other by-products after chlorine dioxide disinfection. Given that these substances have significant triple effects (carcinogenic, teratogenic, and mutagenic) on the human body, the generation and control of disinfection by-products has always been the focus of continuous attention in the field of drinking water [Ric...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88
Inventor 蒋金楚文海高乃云祝淑敏
Owner TONGJI UNIV
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