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Preparation method of standard sample of high molecular material containing harmful substances

A technology of polymer materials and harmful substances, applied in the field of analytical chemistry, can solve the problems of poor uniformity of standard samples, unusable, poor reproducibility of results, etc., and achieve the effect of good uniformity and simple operation process

Inactive Publication Date: 2010-08-04
INSPECTION & QUARANTINE TECH CENT SHANDONG ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the uniformity of the standard samples prepared by this method is poor, resulting in poor reproducibility of the results, and even unusable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: preparation method of standard sample of acrylonitrile-styrene-butadiene copolymer containing azo dye

[0015] 1. Weigh 20g of ABS matrix sample into a 500mL flask;

[0016] 2. Add 400mL acetone and ultrasonically dissolve it;

[0017] 3. Add 0.2 mL each of azo dye direct blue standard solution (1000 μg / mL) and Congo red standard solution (1000 μg / mL), vortex for 10 min, and sonicate for 1 min to make it fully mixed;

[0018] 4. Transfer the solution to a Teflon tray, put it in a fume hood, and let it dry overnight;

[0019] 5. After the solvent evaporates completely, take out the prepared sample, cut it into pieces with stainless steel scissors, and crush it with a freezer grinder to finally obtain an ABS standard sample containing 10 mg / kg each of Direct Blue and Congo Red.

Embodiment 2

[0020] Embodiment 2: the preparation method of standard sample of acrylonitrile-styrene-butadiene copolymer containing primary aromatic amine

[0021] 1. Weigh 20g of ABS matrix sample into the flask;

[0022] 2. Add 400mL acetone and ultrasonically dissolve it;

[0023] 3. Add 133 μL each of 4-chloroaniline standard solution (1500 μg / mL) and 3,3′-dichlorobenzidine standard solution (1500 μg / mL), 200 μL of aniline standard solution (1000 μg / mL), ultrasonically dissolve and mix Uniform;

[0024] 4. Transfer the solution to a Teflon tray, put it in a fume hood, and let it dry overnight;

[0025] 5. After the solvent is completely evaporated, take out the prepared sample, cut it with stainless steel scissors, and crush it with a freezer grinder to finally obtain 10 mg / kg each of 4-chloroaniline, 3,3'-dichlorobenzidine, and aniline ABS standard samples.

Embodiment 3

[0026] Embodiment 3: the polystyrene standard sample preparation method containing primary aromatic amine

[0027] 1. Weigh 20g of PS matrix sample into the flask;

[0028] 2. Add 400mL of dichloromethane and ultrasonically dissolve it;

[0029] 3. Add 133 μL each of 4-chloroaniline standard solution (1500 μg / mL) and 3,3′-dichlorobenzidine standard solution (1500 μg / mL), 200 μL of aniline standard solution (1000 μg / mL), ultrasonically dissolve and mix Uniform;

[0030] 4. Transfer the solution to a Teflon tray, put it in a fume hood, and let it dry overnight;

[0031] 5. After the solvent is completely evaporated, take out the prepared sample, cut it with stainless steel scissors, and crush it with a freezer grinder to finally obtain 10 mg / kg each of 4-chloroaniline, 3,3'-dichlorobenzidine, and aniline PS standard sample.

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PUM

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Abstract

The invention discloses a preparation method of a standard sample of a high molecular material containing harmful substances, comprising the following steps of: firstly weighing a matrix high molecular material sample, adding an organic solvent, and completely dissolving the matrix high molecular material sample by using ultrasound; then adding a standard solution of the harmful substances to a high molecular material solution, stirring or using the ultrasound or whirling so that the solutions are uniformly mixed; pouring the solution to a polytetrafluoroethylene disk, taking a prepared sample out till the organic solvent is totally volatilized, shearing into pieces by using a stainless steel shear, and smashing by using a freezing grinder to obtain the standard sample of the high molecular material containing the harmful substances. The invention adopts a liquid phase method for preparation; the obtained standard sample has good uniformity; in addition, the operation process is simple and fast without additional equipment and can be carried out in a common laboratory.

Description

technical field [0001] The invention relates to a preparation method of a standard sample, which belongs to the technical field of analytical chemistry. Background technique [0002] Currently commercial standard samples of polymer materials containing hazardous substances are scarce. The standard sample is crucial and indispensable for conditional experiments in the development of detection methods; it is also a must for laboratory quality control. [0003] At present, the standard samples of polymer materials containing harmful substances are usually prepared by handing over the matrix material and harmful target substances to the plastic manufacturer, and adding them by blending and other processing techniques. However, the uniformity of the standard sample prepared by this method is poor, resulting in poor reproducibility of the results, or even unusable. Contents of the invention [0004] In view of the above problems, the object of the present invention is to provi...

Claims

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Application Information

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IPC IPC(8): G01N1/28G01N1/38
Inventor 牛增元叶曦雯罗忻王岩汤志旭蔡发刘心同
Owner INSPECTION & QUARANTINE TECH CENT SHANDONG ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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