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Method for quickly detecting haloacetic acids serving as disinfection byproducts in drinking water

A technology for disinfection by-products and detection methods, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of easy deviation in quantification, increase of detection limit, incomplete separation of HAAs, etc., and achieve high precision and high sensitivity

Inactive Publication Date: 2012-06-27
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But because the HILIC chromatographic column is a kind of forward chromatographic separation column, the sample needs to be dissolved in 90% acetonitrile, which causes the detection limit of the method to be greatly improved because of the dilution factor, which limits the scope of application of the method (Chen C Y , Chang S N, Wang G S. Determination of ten haloacetic acids in drinking water using high-performance and ultra-performance liquid chromatography-tandem mass spectrometry. J. Chromatogr. Sci, 2009, 47: 67-74.)
2010 Meng using UPLC BEHC 8 Nine kinds of haloacetic acids were separated by direct sample injection, but the detection limit of TBAA was too high, and the determination of actual water samples would be seriously interfered by inorganic ions in water, and the quantification was prone to deviation (Meng L, Wu S, Ma F, Jia A, Hu J. Trace determination of nine haloacetic acids in drinking water by liquid chromatography-electrospray tandem mass spectrometry. J. Chromatogr. A, 2010, 1217: 4873-4876)
But HAAs can not be separated completely, and the rate of recovery of MCAA, MBAA is only 23% and 25% (Li Zonglai, He Qin. UHPLC tandem mass spectrometry detects haloacetic acid in drinking water. Analytical Chemistry, 2011, 30 (2) :574-576)

Method used

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  • Method for quickly detecting haloacetic acids serving as disinfection byproducts in drinking water
  • Method for quickly detecting haloacetic acids serving as disinfection byproducts in drinking water
  • Method for quickly detecting haloacetic acids serving as disinfection byproducts in drinking water

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Embodiment 1

[0033] A rapid detection method for disinfection by-product haloacetic acid in drinking water, comprising the following steps:

[0034] The first step, configuration mobile phase, mobile phase is made up of chromatographic grade methanol A and ultrapure water B containing 0.0005% formic acid (volume ratio), wherein the specific configuration process of ultrapure water B containing 0.0005% formic acid (volume ratio) is : Take a clean 100ml brown volumetric flask, add 100μl of chromatographic grade pure formic acid accurately, use ultrapure water to set it to the mark line, and the concentration of formic acid is 0.1% at this time; take 1ml from the formic acid solution into a clean 200ml volumetric flask Then use ultrapure water to set to the mark line, at this time the concentration of formic acid is 0.0005%. At 25°C, the conductance of ultrapure water is 18.2MΩ·cm, the online monitoring TOC is less than 1μg / L, and the pH is 5.6.

[0035] The second step, chromatographic cond...

Embodiment 2

[0065] Containing volume ratio in ultrapure water is 0.005% formic acid, still select the tap water of above-mentioned a, b, c, d and e for use, all the other conditions are identical with embodiment one, the result shows, can finish separation in the same time, but the separated Effect is not as good as embodiment one.

Embodiment 3

[0067] Containing volume ratio in ultrapure water is 0.0001% formic acid, still select the tap water of above-mentioned a, b, c, d and e for use, all the other conditions are identical with embodiment one, the result shows, can finish separation in the same time, but separation Effect is not as good as embodiment one.

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Abstract

The invention discloses a method for quickly detecting haloacetic acids serving as disinfection byproducts in drinking water. Chromatographic methanol and super pure water containing methanoic acid with volume ratio of between 0.005 and 0.0001 percent are used as flow phases; corresponding mass spectrum conditions and chromatograph conditions are set by using an ultra performance liquid chromatogram-electrospray ionization-series four-level-rod mass spectrometer (UPLC-ESI-MS / MS) and an UPLC hierarchical service system (HSS) T3 chromatographic column (the column length* the inner diameter= 100mm* 2.1 mm) in the Waters company; a standard curve is constructed; and the PH of a sample is adjusted to be 2.0 to 3.0, so that a matrix effect is eliminated. According to the method, nine haloacetic acids can be totally separately measured within 13.5 minutes; the method has the advantages of high sensitivity, precision, accuracy and the like, and toxic chemical residual substance cannot be produced; and the method is applied to quickly detecting the haloacetic acids in the drinking water.

Description

technical field [0001] The invention belongs to the field of environmental detection, and in particular relates to a rapid detection method of haloacetic acid, a disinfection by-product in drinking water. Background technique [0002] When chlorine is used to disinfect drinking water, in addition to the trihalomethanes (THMs) formed, haloacetic acids (HAAs) are the second most common and more harmful disinfection by-products, accounting for 10% of the total disinfection by-products. 13%, but the toxicity is more than 90%, so the detection of HAAs is of great significance to ensure the quality of water supply. The U.S. Environmental Protection Agency (USEPA) stipulates in the "National primary drinking water regulations: Disinfectants and Disinfection Byproducts (D / DBP) rule" that the sum of five haloacetic acids (MCAA, MBAA, DCAA, DBAA and TCAA) in drinking water should not exceed 60μg / L. According to the Hygienic Standards for Drinking Water (GB / T5749-2006) promulgated by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 段晋明李伟司佳
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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