Method for determining total volatile organic compounds in disposable mask

A technology of volatile organic compounds and determination methods, which is applied in the detection field, can solve the problems of the lack of methods for the determination of total volatile organic compounds in masks, etc., and achieve the effects of improving efficiency, sensitivity, good repeatability, and high degree of operation automation

Pending Publication Date: 2022-05-13
TIANJIN VOCATIONAL INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to address the problem of the lack of measuring methods for total volatile organic compounds in masks in the prior art, and provide a method for measuring total volatile organic compounds in disposable masks based on automatic headspace sampling-gas chromatography mass spectrometry

Method used

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  • Method for determining total volatile organic compounds in disposable mask
  • Method for determining total volatile organic compounds in disposable mask
  • Method for determining total volatile organic compounds in disposable mask

Examples

Experimental program
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Effect test

Embodiment 1

[0029] 1. Preparation of standard working solution:

[0030] Accurately weigh 50.43 mg of n-undecane and 51.04 mg of n-tridecane, use chromatographically pure n-hexane to make a high-concentration mixed standard solution as the stock mother solution, and then dilute it with methanol to form a 1-5 standard working solution. The concentration range of the working solution is See Table 1.

[0031] Table 1 Concentration range of working solution

[0032] name level 1, ng level 2, ng level 3, ng level 4, ng level 5, ng n-undecane 100.86 201.72 504.30 1008.6 2017.2 Tridecane 102.08 204.16 510.40 1020.8 2041.6

[0033] 2. Detection of n-undecane and n-tridecane standard solution and drawing of standard curve:

[0034] 2-1. Accurately pipette 1 μL of the prepared 1-5 standard working solution above into the headspace bottle, put them into the headspace sampler to balance and test; the instrument conditions for the test are:

[0035] The c...

Embodiment 2

[0044] In the assay method of this embodiment: Weigh 1.0 g of shredded disposable protective masks in the headspace sample bottle, add 5mL of pure water, seal the headspace bottle, the equilibrium temperature is 80 ° C, and balance for 30 minutes. The results of the measurement are shown in Table 3 shows.

[0045] Table 3. Total volatile organic compound content of disposable protective masks

[0046] Section A 2118μg / kg Section B 512μg / kg Total Volatile Organic Compounds 2630μg / kg

[0047] Calculation of the content of section A: the sum of the peak areas of all compounds within the retention time range of section A is brought into the n-undecane curve equation to obtain the content of volatile organic compounds in section A.

[0048] C A段 =The sum of the peak areas of all compounds within the retention time range of section A / K 正十一烷 = 296400447 / 139946 = 2118 μg / kg.

[0049] Calculation of the content of section B: the sum of the peak areas o...

Embodiment 3

[0054] In the determination method of this embodiment: Weigh 1.0 g of shredded disposable medical masks into the headspace sampling bottle, add 5 mL of pure water, seal the headspace bottle, and balance the temperature at 80 ° C for 30 minutes. See the results of the measurement Table 4 shows.

[0055] Table 4. Total volatile organic compound content of disposable medical masks

[0056] Section A 101μg / kg Section B 30.5μg / kg Total Volatile Organic Compounds 132μg / kg

[0057] Calculation of the content of section A: the sum of the peak areas of all compounds within the retention time range of section A is brought into the n-undecane curve equation to obtain the content of volatile organic compounds in section A.

[0058] C A段 =The sum of the peak areas of all compounds within the retention time range of section A / K 正十一烷 = 14162444 / 139946 = 101 μg / kg.

[0059] Calculation of the content of section B: the sum of the peak areas of all compounds wi...

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Abstract

The invention discloses a method for determining total volatile organic compounds in disposable masks, which comprises the following steps: step 1, preparing a mixed standard solution of n-undecane and n-tridecane; step 2, setting gas chromatography conditions and mass spectrometry conditions, detecting the standard solution of n-undecane and n-tridecane, and drawing a standard curve; step 3, preparing the sample into a preset size, heating and balancing by using an automatic headspace sampler, injecting air at the upper part of a headspace bottle into a gas chromatography-mass spectrometer for separation after the balance is achieved, and performing separation and quantitative detection under the gas chromatography condition and the mass spectrum condition in the step 2 to obtain a chromatogram; and step 4, dividing the obtained chromatogram into two sections according to retention time, respectively substituting the sum of the peak areas of the section A and the section B into corresponding regression equations of n-undecane and n-tridecane, and adding the calculation results to obtain the content of the total volatile organic compounds. The headspace chromatography-mass spectrometry method for determining the content of the total volatile organic compounds is simple and convenient to operate and accurate in determination result.

Description

technical field [0001] The invention relates to the technical field of detection, in particular to a method for measuring total volatile organic compounds in disposable masks. Background technique [0002] Wearing a mask is one of the most effective means of preventing and controlling the new coronavirus, which can effectively reduce the risk of infection with the new coronavirus. With the spread of the epidemic, people's demand for masks has surged. Common disposable masks are usually composed of 3 or more layers of non-woven fabrics, which are divided into spunbond layer, meltblown layer, and spunbond layer from the inside to the outside, and the raw materials are polypropylene. Polypropylene is a non-toxic, odorless milky white crystalline polymer, which has the advantages of low density, strong mechanical toughness, acid, alkali and organic solvent resistance, etc., and is widely used in the production of nonwoven fabrics. Affected by monomer, catalyst, polymerization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/88G01N30/06G01N30/24
CPCG01N30/88G01N30/06G01N30/24
Inventor 王欣袁永顺祖晓冬李霞
Owner TIANJIN VOCATIONAL INST
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