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Laboratory quality control technology for phthalate detection in wine and application thereof

A technology of medium phthalates and phthalates, which is applied in the field of analysis and detection, can solve problems such as poor repeatability and unstable test results, and achieve the goal of improving analysis speed and ensuring repeatability and stability Effect

Inactive Publication Date: 2015-01-14
王传现 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual testing process, it is found that there is an obvious matrix effect, resulting in unstable and poor repeatability of the test results. At present, how do the relevant laboratories ensure the accuracy and reliability of the results, and how to implement the quality control measures for the actual testing work? lack of technology

Method used

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  • Laboratory quality control technology for phthalate detection in wine and application thereof
  • Laboratory quality control technology for phthalate detection in wine and application thereof
  • Laboratory quality control technology for phthalate detection in wine and application thereof

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Embodiment Construction

[0028] The following is a detailed description of the embodiments of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention and provides a detailed implementation plan and a specific operation process. But the scope of protection of the present invention is not limited to the following specific examples.

[0029] 1 Sample preparation

[0030] Liquid samples are mixed evenly and stored in clean glass containers. Contamination should be avoided throughout the process.

[0031] 2 analysis steps

[0032] 2.1 Extraction

[0033] Accurately weigh 2.0g (accurate to 0.01g) of a uniformly mixed liquid sample (remove carbon dioxide first if it contains carbon dioxide gas) into a 10mL stoppered ground glass test tube, add 3.0mL of n-hexane, vortex and mix for 2min, and let stand. Take the supernatant, add anhydrous sodium sulfate for dehydration, take 1ml accurately, add 20μL isotope internal standard for GC-MS analysis...

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Abstract

The invention discloses a laboratory quality control technology for phthalate detection in wine and application thereof. The detection technology is as follows: extracting phthalate in a sample with n-hexane, taking a supernatant for dehydration, using d4-di (2-ethyl) hexyl phthalate (d4-DEHP) as an internal standard for detecting by gas chromatography-mass spectrometry. By using feature selected ion monitoring scan mode (SIM), chromatographic retention time and debris abundance ratio are taken for determination on the nature and an internal standard method is taken for determination on the quantify. The method provided by the invention is simple, good in stability, high in sensitivity and convenient to use, and can realize the rapid on-site detection of the phthalate.

Description

technical field [0001] The invention belongs to the technical field of analysis and detection, relates to a phthalate in wine and laboratory quality control technology, more specifically relates to a method for detecting phthalate in wine using isotope internal Standard dilution, gas chromatography mass spectrometry detection technology and its application. Background technique [0002] Phthalic acid esters (phthalic acid esters, PAEs), also known as phthalic acid esters, is a general term for esters formed by phthalic acid. Generally, it is a colorless viscous oily liquid with low volatility, high stability, aromatic odor or odorless. It has little solubility in water and is easily soluble in most non-polar organic solvents. Phthalates are a class of softening chemicals commonly used in toys, food packaging, vinyl floors, wallpaper, cleaners, nail polish, sprays, shampoos and body washes, and hundreds of other of products. Phthalates can interfere with endocrine, reduce...

Claims

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Application Information

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IPC IPC(8): G01N30/02
Inventor 王传现李晓虹何宇平赵百慧田桢干刘夏张子龙陈立
Owner 王传现
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