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Method for measuring volatile organic compounds released by bag

A technology of organic compounds and determination methods, applied in the field of determination of volatile organic compounds released in bags, can solve the problems of high detection cost, lack of overall evaluation of samples, operator health and environmental hazards, etc.

Inactive Publication Date: 2018-11-16
GUANGZHOU FIBER PROD TESTING & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current test method, the following problems exist in the test of volatile organic compounds on luggage: the luggage needs to be cut and tested, which will cause irreversible damage to the luggage sample to be tested, and the detection cost is high; and the sampling is localized , there is a lack of overall evaluation of samples, which cannot reflect the real situation; adhesives are the main source of volatile organic compounds in bags, and it is difficult to sample adhesives in finished products; samples are extracted with organic solvents, and the use of organic solvents will Hazard to operator's health and environment

Method used

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  • Method for measuring volatile organic compounds released by bag
  • Method for measuring volatile organic compounds released by bag
  • Method for measuring volatile organic compounds released by bag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for the determination of releasable volatile organic compounds in bags provided in this embodiment comprises the following steps:

[0043] 1. Sampling

[0044] The sample to be tested in the present embodiment is blue children's backpack (volume is about 24L), this backpack is put into the polyvinyl fluoride sampling bag of 50L volume, seals with sealing strip, and sampling bag is provided with interface valve. Fill the sampling bag with the sample sealed with pure nitrogen, the filling volume is 30% of the capacity of the sampling bag, and then use the pump to evacuate the gas, repeating 2-3 times. Then fill it with 20L of pure nitrogen at an ambient temperature of 25±2°C, close the interface valve, and seal the sampling bag. Take another blank sampling bag without putting the sample to be tested, and perform the above steps as a control. Place the two sampling bags in a constant temperature environment chamber at 70±2°C for heating and keep for 4 hours. At...

Embodiment 2

[0087] The influence of embodiment 2 sample processing temperature on test result

[0088] Detect according to the method of embodiment 1, just change the heating temperature in the constant temperature environment chamber, other steps and method are all the same as embodiment 1. That is, the samples to be tested were processed at 37° C., 60° C., 70° C., and 80° C. respectively, and the processing time was the same as in Example 1. Test results such as figure 2 As shown, the results show that the higher the temperature, the greater the release of volatile organic compounds. When the treatment temperature rises to 70°C, the release of volatile organic compounds is basically complete; when the treatment temperature is 80°C, the bags will fade 70°C is the optimal heating treatment temperature, taking into account the time required for detection and the accuracy of the test results, as well as not causing damage to the sample to be tested, and reducing the consumption of samplin...

Embodiment 3

[0089] Example 3 The impact of sample processing time on test results

[0090] Detect according to the method of embodiment 1, just change the time of heat treatment in the constant temperature environment cabin, other steps and method are all the same as embodiment 1. That is to say, the sampling bags were kept in a constant temperature environment chamber at 70°C for 1h, 2h, 4h and 8h. Test results such as image 3 As shown, the results show that: the longer the sample is heat-treated, the greater the release of volatile organic compounds, and the release will basically not increase after 4 hours. Considering the detection efficiency and detection accuracy, the heat treatment time of the sample is 4h is the best choice.

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Abstract

The invention relates to a method for measuring volatile organic compounds released by a bag. The method comprises sampling: putting a bag sample to be detected into a sampling bag, carrying out heating at 70+ / -10 DEG C for 3-6h so that the volatile organic compounds in the bag sample to be detected are released into the sampling bag and taking volatile organic compound samples from the sampling bag through a Tenax-TA sampling pipe, and detection: detecting TDS / GC / MS of the Tenax-TA sampling pipe after sampling. The method can accurately determine the content of the releasable volatile organiccompounds in the bag without destroying the samples to be tested, can greatly reduce the detection cost and is economical and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a method for measuring releasable volatile organic compounds in bags. Background technique [0002] Volatile organic compounds are a large source of harmful substances. The World Health Organization defines them as a general term for organic compounds with a melting point lower than room temperature and a boiling point lower than 200-260°C under standard atmospheric pressure. According to the chemical structure, volatile organic compounds can be divided into 12 types of alkanes, alkenes, alkynes, benzene series, alcohols, aldehydes, ethers, ketones, acids, esters, halogenated hydrocarbons and others. Most of the toxic ones are benzene series and halogenated hydrocarbons. Taking formaldehyde and benzene as examples, long-term exposure can lead to chronic visceral dysfunction and even cancer; toluene and xylene may cause sensory (such as eyes or nose) irritation or ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06
CPCG01N30/02G01N30/06
Inventor 廖芸罗峻朱奕轩胡剑灿莫月香杨欣卉谢剑飞
Owner GUANGZHOU FIBER PROD TESTING & RES INST
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