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Preparation method of dibutyl phthalate standard sample

A technology of dibutyl phthalate and standard sample, which is applied in the field of preparation of standard samples for the determination of dibutyl phthalate in milk powder, can solve problems such as difficult control of laboratory blanks, difficult realization, etc. The effect of strong operability, uniform sample and simple preparation method

Inactive Publication Date: 2017-07-04
黑龙江省药品检验研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Standard samples are generally required to have sufficiently high uniformity and stability, and the particularity of the detection of phthalates is not only that they exist in trace amounts in milk powder, but also are easy to introduce high and relatively high levels during laboratory processing. Difficult to control laboratory blank, therefore, it is difficult to prepare a homogeneous sample at this level

Method used

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  • Preparation method of dibutyl phthalate standard sample
  • Preparation method of dibutyl phthalate standard sample
  • Preparation method of dibutyl phthalate standard sample

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specific Embodiment approach 1

[0013] Specific embodiment one: the scheme of present embodiment is as follows: a kind of preparation method of dibutyl phthalate standard sample, it is to carry out according to the following steps:

[0014] 1. Substrate pretreatment: fully mix the milk powder, sieve, and take the milk powder that does not contain dibutyl phthalate after testing, and set aside;

[0015] 2. Preparation of samples: using the uniform distribution method, first quantitatively dissolve dibutyl phthalate in a solvent, mix evenly, and obtain dibutyl phthalate solution; then prepare dibutyl phthalate The solution is evenly distributed into the matrix, stirred evenly, after the solvent is volatilized, freeze-dried, pulverized, stirred and mixed again, and sieved to obtain a small sample with a concentration of 10-20mg / kg, and then mix the matrix and the small sample evenly, Sieve to obtain dibutyl phthalate standard sample;

[0016] Among them, the mass volume ratio of dibutyl phthalate to solvent is...

specific Embodiment approach 2

[0017] Embodiment 2: This embodiment is different from Embodiment 1 in that: the solvent is acetonitrile, methanol or absolute ethanol. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the mass ratio of the small sample to the matrix is: 0.3-0.4g: 1g. Others are the same as in the first embodiment.

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Abstract

The invention relates to a preparation method of a standard sample, and concretely relates to a preparation method of a dibutyl phthalate standard sample. The preparation method is disclosed to solve the problem of difficult preparation of the standard sample in the phthalate detection process. The method is characterized in that dibutyl phthalate is added to a matrix according to a ratio of 1-5 mg / kg, and the matrix is milk powder. The method is helpful for improving the accuracy and the reliability of detection data of phthalates in a food in laboratories, and lays a foundation for the unified detection standard of the phthalates in the food. The sample is applied to the field of the detection of the phthalates.

Description

technical field [0001] The invention relates to the field of standard sample preparation, in particular to a method for preparing standard samples for measuring dibutyl phthalates in milk powder. Background technique [0002] Phthalates are mainly used to improve the processing performance and strength of plastics, and are widely used in plastic and rubber material products. Phthalates and plastic molecules are connected by hydrogen bonds and van der Waals forces, and are easily migrated from plastics and their products to the environment. Since phthalates widely exist in nature, they migrate through physical and chemical actions such as contact, friction, and dissolution of food packaging materials, or are introduced into food as illegal food additives, after ingestion of phthalates It will interfere with the human endocrine system, endanger the human immune function, digestive system, and reproductive system, and has potential "three-induced" effects. The European Union,...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 姜连阁王金翠多凯庄舒翔董露璐赫志强张博超王佳音李梓木刘秀清安宏
Owner 黑龙江省药品检验研究中心