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Method for determining trace lead in textile products

A textile and trace technology, applied in the field of inspection and quarantine, to achieve the effects of improving measurement sensitivity, saving money, and reducing matrix interference

Inactive Publication Date: 2012-05-16
PEOPLES REPUBLIC OF CHINA BEIJING ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

It solves the problem that trace Pb in textiles can also be determined by inductively coupled plasma optical emission spectrometry (ICP-OES) when the Pb ion concentration is lower than 10ng / mL. This method can accurately determine the Pb concentration in the extract solution at 5ng / mL or less

Method used

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  • Method for determining trace lead in textile products
  • Method for determining trace lead in textile products
  • Method for determining trace lead in textile products

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Experimental program
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Embodiment 1

[0028] 1 Instruments and reagents

[0029] Prodigy XP Inductively Coupled Plasma Atomic Emission Spectrometer (Leeman Company), its working conditions: power 1.2 KW, atomizing gas pressure 28 psi, auxiliary gas flow 0.1 LPM, cooling gas flow: 20 LPM; pump speed: 1.5 mL / min , Pb detection wavelength 220.353 nm.

[0030] The Pb standard solution was provided by the National Center for Standard Substances.

[0031] All the conventional reagents used in the experiments were of superior grade or analytical grade.

[0032] The experimental water was 18.2 MΩ·cm ultrapure water.

[0033] nano-TiO 2 (average particle size ≤ 25 nm) was purchased from Hangzhou Wanjing New Material Co., Ltd.

[0034] Preparation of acidic sweat: weigh 0.5g of L-histidine, 5g of sodium chloride, and 2.2 g of sodium dihydrogen phosphate dihydrate, dissolve them in a beaker, and transfer them to a 1L volumetric flask.

[0035] 2 Experimental methods

[0036] 2.1 Nano-TiO 2 deal with

[0037] Nano TiO...

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Abstract

The invention discloses a method for determining trace lead in textile products, which comprises the following steps of: after a heavy metal Pb in a textile product is extracted by using acidic perspiration, gathering a trace heavy metal Pb in an extracting solution by using nano TiO2; and then, carrying out determination by using an ICP-OES (inductively coupled plasma optical emission spectroscopy) method. Because the content of the heavy metal Pb in the solution subjected to gathering is high, the determination sensitivity is improved, and a determination operation can be performed by using an ICP (inductively coupled plasma) emission spectrum; and in the process of gathering, the salt content in a textile-product extracting solution is reduced, thereby reducing the matrix interference in the process of spectrum determination.

Description

technical field [0001] The invention belongs to the field of inspection and quarantine, and in particular relates to a method for determining trace lead in textiles. Background technique [0002] my country is the world's largest producer, exporter and consumer of textiles and clothing, and the textile industry is a pillar industry for my country's export earnings. According to China Customs statistics, during January-November 2007, my country's textile and clothing exports totaled US$160.651 billion, accounting for 60.28% of the country's total trade surplus. At present, the United States, Japan, Hong Kong and some countries in the European Union are the main exporting countries of my country's textile products, and these countries and regions usually regard the safety and hygiene indicators of textiles as one of the important standards to measure their internal quality. Various environmental safety project requirements have been formulated for textiles, and only products t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28
Inventor 唐晓萍王强刘来福崔莎莎张磊王寅超黄华王静周征宇严兰珍朱林平席再娟苗其来周建
Owner PEOPLES REPUBLIC OF CHINA BEIJING ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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