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Determination method of the total amount of 2‑phenyl‑2‑propanol in plastics and plastic products

A technology for plastic products and determination methods, which is applied in the field of chemical detection, can solve the problems of inability to accurately measure the total amount, and achieve the effects of outstanding method selectivity, high sensitivity, and high accuracy

Active Publication Date: 2017-08-01
INSPECTION & QUARANTINE TECH CENT SHANDONG ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in the prior art, the measurement of 2-phenyl-2-propanol in plastics is limited to the amount of dissolution, and the total amount cannot be accurately determined.

Method used

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  • Determination method of the total amount of 2‑phenyl‑2‑propanol in plastics and plastic products
  • Determination method of the total amount of 2‑phenyl‑2‑propanol in plastics and plastic products
  • Determination method of the total amount of 2‑phenyl‑2‑propanol in plastics and plastic products

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Embodiment 1

[0046] The assay method of the total amount of 2-phenyl-2-propanol in the plastics and plastic products of the present embodiment may further comprise the steps:

[0047] Step 1: Prepare 2-phenyl-2-propanol standard stock solution

[0048] Dissolve the 2-phenyl-2-propanol standard substance in methanol to prepare a 2-phenyl-2-propanol standard stock solution with a concentration of 1000ug / ml, and store the standard stock solution in airtight conditions at 0-4°C. Valid for 4 weeks;

[0049] Step 2: Prepare 2-phenyl-2-propanol standard working solution

[0050] Pipette 0.1mL, 0.4mL, 0.8mL, 1.2mL, 1.6mL, and 2.0mL of 2-phenyl-2-propanol standard stock solutions into 100mL volumetric flasks, dilute to the mark with methanol, and the concentration of the standard working solution is 1.0μg / mL, 4.0μg / mL, 8.0μg / mL, 12.0μg / mL, 16.0μg / mL, 20.0μg / mL; keep the standard working solution airtight at 0-4°C, and the validity period is 2 weeks;

[0051] Step 3: Establish a working curve for...

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Abstract

The invention belongs to the technical field of chemical detection methods and relates to a method for measuring the total amount of 2-phenyl-2-propanol in plastic and plastic products. The method includes the following steps that a 2-phenyl-2-propanol standard stock solution is prepared; a 2-phenyl-2-propanol standard work solution is prepared; a work curve of the 2-phenyl-2-propanol standard work solution is prepared; extraction is carried out, plastic or plastic products to be measured are frozen and smashed into powder, dissolved in a toluene-acetone solution and placed in a microwave extraction tank, extraction liquid is transferred into a volumetric flask after microwave extraction, the extraction tank is flushed through a toluene-acetone solution, the solutions are combined, and volume is measured through a toluene-acetone solution; measurement is carried out through a gas chromatography-mass spectrometer under the selected analysis condition; the total amount of the 2-phenyl-2-propanol in the plastic and the plastic products is precisely measured. Operation is easy, accuracy is high, reproducibility is good, and actual detection requirements can be met.

Description

technical field [0001] The invention belongs to the technical field of chemical detection methods, and in particular relates to a method for accurately measuring the total amount of 2-phenyl-2-propanol in plastics and plastic products. Background technique [0002] 2-Phenyl-2-propanol (2-Phenyl-2-Propanol, 2P2P) is also known as 2-phenylisopropanol (2-Phenylisopropanol), dimethyl benzyl alcohol (Dimethyl benzyl alcohol), chemical formula C 9 h 12 O, 2-phenyl-2-propanol has certain toxicity, if swallowed, it can cause bodily harm, and contact can also cause eye irritation. [0003] At present, 2-phenyl-2-propanol is mainly used as a solvent in the production process of ethylene-vinyl acetate copolymer (EVA). EVA monomer is a viscous liquid, which is mainly used for the manufacture of coatings and adhesives. Monomers such as vinyl chloride and styrene are copolymerized into EVA plastics to improve the hardness of monomers such as styrene and increase elasticity and toughness...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/06
Inventor 戚佳琳管嵩郭心迪戚佳睿田瀚韬
Owner INSPECTION & QUARANTINE TECH CENT SHANDONG ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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