Screening method of total lead content in textile

A screening method and lead content technology, applied in the preparation of test samples, measuring devices, material analysis through observation of the impact on chemical indicators, etc., can solve problems such as few reports, achieve short detection time and save costs , the effect of simple operation

Inactive Publication Date: 2017-06-20
SHANGHAI INST OF QUALITY INSPECTION & TECHN RES +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Visual colorimetry, because of its simple operation, low cost and quick response, has become a commonly used detection method in the rapid detection of heavy metal content, but there are few reports on the rapid detection of lead content in textiles.

Method used

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  • Screening method of total lead content in textile
  • Screening method of total lead content in textile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Comparative example 1——color development object of lead solution

[0053] Weigh 5 parts of 0.5g coating, cut into pieces; add 5ml concentrated nitric acid and 1ml hydrogen peroxide to each coating, then add 0μL, 10μL, 30μL, 50μL, 100μL lead standard solution (1000ppm ), after wet digestion at 160°C for 50min, cool to room temperature; filter to remove the digested residue in the solution, then add 3mL concentrated sodium hydroxide solution to the filtrate; adjust the pH value of the filtrate with dilute nitric acid and sodium hydroxide solution is about 3.0-4.5, then add 0.5mL ascorbic acid solution, 1mL potassium iodide solution and 0.4mL malachite green solution to the filtrate, set the volume to 10mL, and mix well to prepare the color-developed object of the lead solution (see figure 1 shown).

[0054] By Example 1 and figure 1 It can be seen that the corresponding textiles to which 0 μL, 10 μL, 30 μL, 50 μL and 100 μL of lead standard solution are added respective...

Embodiment 2

[0056] Weigh 2 parts of 0.5g of coatings with lead content not exceeding the standard and 2 parts of 0.5g of coatings with lead content exceeding the standard, and number them respectively as 1#, 2#, 3# and 4#, and cut each sample into pieces; Add 5mL concentrated nitric acid and 1mL hydrogen peroxide to each sample, after 160°C wet digestion for 50min, cool to room temperature; where:

[0057] Filter 1# and 3#, dilute to 50mL with deionized water, and then use inductively coupled plasma-atomic emission spectrometry to determine the total lead content in textiles;

[0058] Filter 2# and 4# to remove the digested residue in the solution, then add 3mL of concentrated sodium hydroxide solution to the filtrate, adjust the pH value of the filtrate to about 3.0-4.5 with dilute nitric acid and sodium hydroxide solution, and then add to the filtrate Add 0.5mL of ascorbic acid solution, 1mL of potassium iodide solution and 0.4mL of malachite green solution to the solution, and set the ...

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Abstract

The invention provides a screening method of a total lead content in a textile. The method comprises the steps of (1) cutting 0.5g of textile coating into pieces; (2) adding 5mL of concentrated nitric acid and 1mL of hydrogen peroxide, carrying out wet digestion for 40 to 60min under an environment with the temperature being 150 to 170 DEG C, and cooling to the room temperature; (3) filtering, and adding 3mL of strong sodium hydroxide solution into a filter liquor; (4) using dilute nitric acid and a dilute sodium hydroxide solution to adjust a pH value of the filter liquor to 3.0 to 4.5, respectively adding 0.5mL of ascorbic acid solution, 1mL of potassium iodide solution and 0.4mL of malachite green solution into the filter liquor, filling to volume being 10mL, and after uniformly mixing, determining the total lead content in the textile according to a lead solution developing entity. The method is simple to operate, low in cost, and capable of quickly determining the total lead content in the textile through a malachite green complexation developing method and a visual colorimetric method, and has a favorable application prospect.

Description

technical field [0001] The invention relates to the field of textile testing, in particular to a screening method for the total lead content in textiles. Background technique [0002] During the production or use of textile raw materials, due to environmental pollution or the use of heavy metal-containing auxiliaries and dyes, especially certain dyes and auxiliaries used in fabric processing, such as various metal complex dyes, mordant dyes, and phthalocyanine structures Dyes, color fixing agents, etc., and some anti-mildew, anti-bacterial and deodorant fabrics treated with heavy metals will also cause heavy metal pollution, resulting in textiles that may contain heavy metals that have serious cumulative toxicity to the human body. Therefore, the detection of heavy metal content in textiles has attracted more and more attention. [0003] Domestically, the heavy metal content in textiles has also been strictly limited, and a series of norms and standards have been promulgate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N1/28G01N1/38
CPCG01N21/78G01N1/286G01N1/38
Inventor 韩宁王锦鹏赵海浪余弘王麟庄园园李卫东毛志平
Owner SHANGHAI INST OF QUALITY INSPECTION & TECHN RES
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