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Method for detecting tetraethyl lead in water

A technology of tetraethyl lead and detection method, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of narrow linear range, environmental pollution, poor reproducibility, etc., and achieves a high level of automation, improved sensitivity, and efficient enrichment. Effect

Inactive Publication Date: 2015-02-18
SHANDONG WATER & WASTEWATER MONITORING CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The LLE method is a classic method. This method has strong processing capacity, good separation effect, high recovery rate, and easy automatic operation, but the reproducibility is poor, and a large amount of organic solvent is required, which is easy to cause pollution to the environment.
SPME is a new technology for sample enrichment pretreatment. Its disadvantages are narrow linear range, poor selectivity of adsorption and enrichment, easy adsorption and saturation for samples with complex matrices, and strong correlation between adsorption efficiency and control conditions. It is widely used in practice. poor app performance

Method used

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  • Method for detecting tetraethyl lead in water
  • Method for detecting tetraethyl lead in water
  • Method for detecting tetraethyl lead in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] 1. Find the linear relationship regression equation

[0101] The standard series concentrate obtained by the standard series enrichment (1) is measured under the instrument working condition (1), and the chromatographic peak area produced by the concentration of tetraethyl lead and the instrument measurement presents a good linear relationship, and the linear relationship regression equation is obtained (1): y=41484x+68.05 R=0.9995

[0102] The detection technical indicators are shown in Table 1.

[0103] 2. Determination of water samples

[0104] The concentrated solution obtained by enriching the water sample (1) is measured under the instrument working condition (1), and calculated according to the linear relationship regression equation (1), the concentration of the water sample is 0.14ng mL -1 .

Embodiment 2

[0106] 1. Find the linear relationship regression equation

[0107] The standard series concentrate obtained by the standard series enrichment (1) is measured under the instrument working condition (2), and the chromatographic peak area produced by the concentration of tetraethyl lead and the instrument measurement presents a good linear relationship, and the linear relationship regression equation is obtained (2): y=40254x+125.7 R=0.9992

[0108] The detection technical indicators are shown in Table 1.

[0109] 2. Determination of water samples

[0110] The concentrated solution obtained by enriching the water sample (1) is measured under the working condition of the instrument (2), and calculated according to the linear relationship regression equation (2), the concentration of the water sample is 0.15ng mL -1 .

Embodiment 3

[0112] 1. Find the linear relationship regression equation

[0113] The standard series concentrate obtained by the standard series enrichment (1) is measured under the instrument working condition (3), and the chromatographic peak area produced by the concentration of tetraethyl lead and the instrument measurement presents a good linear relationship, and the linear relationship regression equation is obtained (3): y=42073x+402.4 R=0.9993

[0114] The detection technical indicators are shown in Table 1.

[0115] 2. Determination of water samples

[0116] The concentrated solution obtained by enriching the water sample (1) is measured under the instrument working condition (3), and calculated according to the linear relationship regression equation (3), the concentration of the water sample is 0.15ng mL -1 .

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Abstract

The invention discloses a method for detecting tetraethyl lead concentration in water on the basis of solid-phase extraction enrichment, gas chromatography-inductively coupled plasma-mass spectrometry technologies. The method comprises the following steps: a. enriching tetraethyl lead standard series by virtue of a solid phase extraction technology; b. determining the tetraethyl lead standard series after solid phase extraction enrichment by virtue of GC-ICP-MS (gas chromatography-inductively coupled plasma-mass spectrometry), and obtaining a linear relation regression equation between the tetraethyl lead standard series concentration and the chromatographic peak area generated by an instrument; c. enriching tetraethyl lead in an unknown water sample by virtue of the solid phase extraction technology; and d. determining the enriched tetraethyl lead in the unknown water sample by virtue of GC-ICP-MS, and putting the obtained peak area into the linear relation regression equation drawn in the step b, so as to obtain the concentration of tetraethyl lead in water. According to the method, the detection range is 0.05-5.00mug / L, the detection limit is 5ng / L, the sensitivity is significantly improved, and the method has the advantages of high accuracy and high automatic level.

Description

technical field [0001] The invention relates to a detection method of tetraethyl lead in water, in particular to a detection method of tetraethyl lead in water based on solid phase extraction-gas chromatography-inductively coupled plasma-mass spectrometry technology, belonging to the technical field of water quality environment monitoring. Background technique [0002] Tetraethyl lead is an organometallic compound, which is a highly toxic substance, and its toxicity is 100 times that of metallic lead, and it is often used as a metal chelating agent to rescue lead poisoning, such as calcium sodium edetate (ethylenediaminetetra Calcium Disodium Acetate) has no effect on poisoning by this compound. Skin contact, inhalation of volatiles can be poisoning. After entering the human body, part of it will be transformed into triethyl lead, which can penetrate the blood-brain barrier and damage the central nervous system. Tetraethyl lead was once widely used as an additive in gasoli...

Claims

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Application Information

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IPC IPC(8): G01N30/88G01N30/08
Inventor 贾瑞宝孙韶华辛晓东王明泉赵清华李伟
Owner SHANDONG WATER & WASTEWATER MONITORING CENT