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Method for detecting n-propyl bromide in leather and textiles

A brominated n-propane and detection method technology, which is applied in the detection field of brominated n-propane, can solve the problem that there is no uniform standard and method for brominated n-propane, and achieve the effect of simple, fast and high sensitivity of the detection method

Active Publication Date: 2014-02-26
GUANGZHOU GRG METROLOGY & TEST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the detection of brominated n-propane is limited to the detection of air and water, mainly headspace-gas chromatography, but there is no international unified standard and method for the detection of textiles and leather products.

Method used

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  • Method for detecting n-propyl bromide in leather and textiles
  • Method for detecting n-propyl bromide in leather and textiles
  • Method for detecting n-propyl bromide in leather and textiles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for detecting bromo-n-propane in leather and textiles, using gas chromatography-mass spectrometry to detect, including the following steps:

[0041] A. Standard solution preparation

[0042] Preparation of bromo-n-propane standard stock solution: Weigh a certain amount of bromo-n-propane standard substance, dilute it with chromatographic pure methanol in a 50mL volumetric flask, and make a 1000mg / L stock solution.

[0043] Preparation of bromo-n-propane standard working solution: accurately pipette an appropriate amount of standard stock solution, dilute it step by step with chromatographic pure methanol, and prepare 0.1mg / L, 0.5mg / L, 1mg / L, 2mg / L, 5mg / L, 10mg / L, 20mg / L, 50mg / L standard working solution.

[0044] B. Sample pretreatment

[0045] Sampling: Take a representative sample, cut it into a size of about 5mm×5mm, accurately weigh 1.0g (accurate to 0.0001g), and place it in a 60mL glass reaction flask; add extractant: add 10mL methanol to the glass reaction flask,...

Embodiment 2

[0060] Example 2 The retention time and characteristic fragment ions of the target (bromo-n-propane) in the example are shown in Table 1.

[0061] Table 1 Target retention time, characteristic fragment ions and abundance ratio

[0062] Substance name

[0063] From Table 1 and figure 1 It can be seen that under the detection conditions of Example 1, the target substance (bromo-n-propane) can be well separated.

Embodiment 3

[0064] Example 3 Linear relationship

[0065] Under the optimized detection conditions of the present invention, the brominated n-propane standard solution is detected in the concentration range of 0.1-50 mg / L. See standard working curve figure 2 ,by figure 2 It can be seen that the concentration has a good linear relationship with the response value, the linear equation: Y=4741.42X+1050.904, the correlation coefficient R 2 =0.9995.

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Abstract

The invention discloses a method for detecting n-propyl bromide in leather and textiles. The method is characterized in that the gas chromatography-mass spectrometry combination is used for detection. The detection method is simple, convenient and fast and has high sensitivity. A sample to be detected is in the linear relationship in the range of 0.1-50mg / L, the correlation coefficient is 0.9995, the method detection limit is 0.1mg / L, the standard recovery rate is 96%-112%, and the relative standard deviation (RSD) (n is equal to 7) is less than 2%. The method can be used for detecting the n-propyl bromide in the leather and textiles very well.

Description

Technical field [0001] The invention relates to the field of chemical detection, in particular to a method for detecting bromo-n-propane in leather and textiles. Background technique [0002] On December 17, 2012, the European Chemicals Agency (ECHA) announced on its official website that 54 new SVHC candidate substances were officially confirmed, and the number of SVHC candidate substances will be increased to 138. [0003] 1-Bromopropane, as the eighth batch of 54 new SVHC substances confirmed by REACH, is also known as Propylbromide. It is a colorless liquid and is obtained by catalytic synthesis of hydrogen bromide and propanol. At present, the main uses of brominated n-propane are: as a solvent for fats, paraffins, resins, etc.; intermediates for the manufacture of medicines, pesticides, flavors, seasonings, etc.; cleaning agents for precision electronic instruments; descaling agents and spray bonding The solvent in the agent, etc. [0004] Studies have shown that bromo-n-prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88G01N30/06
Inventor 李支薇王华王海鸣任祥祥
Owner GUANGZHOU GRG METROLOGY & TEST CO LTD
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