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Method for determining tributyl phosphate in dry food packaging paper

A technology of tributyl phosphate and food packaging paper, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of accurate qualitative confirmation and quantitative analysis of unfavorable target compounds, false positives, etc., to reduce errors, improve accuracy, The effect of ensuring accuracy

Active Publication Date: 2013-08-07
CHINA TOBACCO JIANGSU INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For relatively simple matrices, gas chromatography can accurately detect target compounds, but for complex matrix samples, there will be serious "false positive" problems when using gas chromatography to identify target compounds, which is not conducive to accurate qualitative confirmation and quantitative analysis of target compounds

Method used

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  • Method for determining tributyl phosphate in dry food packaging paper
  • Method for determining tributyl phosphate in dry food packaging paper
  • Method for determining tributyl phosphate in dry food packaging paper

Examples

Experimental program
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Embodiment 1

[0028] A method for measuring tributyl phosphate in dry food packaging paper, the specific process is as follows:

[0029] (1) Configuration of internal standard solution

[0030] Accurately weigh 0.2 g of internal standard phenylethyl propionate, and use n-hexane as solvent to dilute to a 100 mL volumetric flask to obtain an internal standard solution with a concentration of 2000 mg / L. Store the internal standard solution in a sealed refrigerator at 4°C, and the validity period is 3 months;

[0031] (2) Configuration of working standard solution

[0032] Accurately weigh 0.2 g of the standard tributyl phosphate, and use n-hexane as the solvent to set the volume to a 100 mL volumetric flask to obtain a standard stock solution with a concentration of 2000 mg / L. Store the standard stock solution in a sealed refrigerator at 4°C, and the validity period is 3 months;

[0033] Accurately pipette 10 μL, 50 μL, 100 μL, 200 μL, 500 μL and 1000 μL of standard stock solution respectiv...

Embodiment 2

[0046] Embodiment 2 Detection of precision and standard addition recovery

[0047] Detection of precision: with a fast food wrapping paper (the measured value was not detected), the content of tributyl phosphate in the spiked sample (the spiked level was 50 mg / kg) was measured in parallel 6 times, and the relative standard deviation was calculated to investigate The precision of the method, the results are shown in Table 1, which shows that the method has good repeatability.

[0048] Table 1 Precision of the method (n=6)

[0049] serial number Measured value (mg / kg) 1 51.41 2 52.05 3 50.64 4 49.74 5 51.08 6 51.17 relative standard deviation(%) 1.52

[0050] Detection of spiked recoveries: Two representative samples (instant food packaging paper and candy paper) were selected as spiked sample matrices, and spiked samples with low, medium, and high concentration levels were prepared respectively. The results As shown in Table...

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Abstract

The invention discloses a method for determining tributyl phosphate in dry food packaging paper. The method comprises the steps of internal standard solution preparation, standard working solution preparation, sample solution preparation, gas-chromatography mass-spectrometry analysis, standard curve drawing, and result calculation. According to the invention, quantitation is carried out with the internal standard method. The operation is simple and accurate, and errors caused by sample pretreatment, instrument precision, and the like can be effectively reduced. With adopted chromatographic conditions, chromatographic peaks of a target and the internal standard are well separated and have certain linear correlation. A detection limit is 0.08mg / kg, a quantification limit is 0.3mg / kg, an average relative standard deviation is 1.52%, and a standard recovery rate is between 93.1% and 99.3%. Therefore, the method provided by the invention has high sensitivity, good repeatability, and high recovery rate.

Description

technical field [0001] The invention belongs to the technical field of physical and chemical index detection of packaging materials, and in particular relates to a method for measuring tributyl phosphate in dry food packaging paper (mainly including instant food packaging paper, candy paper, pasta paper, etc.). Background technique [0002] Tributyl phosphate, also known as n-butyl phosphate, is a flammable, colorless, odorless liquid that decomposes when heated to produce highly toxic phosphorus oxide fumes. Can cause central nervous system excitement, strong irritation to the skin and respiratory tract, and can cause systemic toxicity. It has mild inhibitory effect on cholinesterase in human blood and plasma. In terms of its use, it can be used as a plasticizer, extractant, ink solvent, gas chromatography stationary liquid and organic synthesis intermediate. [0003] Dry food packaging paper is an indispensable and important part of food packaging, and its safety is a ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 廖惠云朱龙杰庄亚东张映熊晓敏朱莹沈晓晨张媛
Owner CHINA TOBACCO JIANGSU INDAL
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