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Method for testing content of tris (nonylphenyl) phosphite

A technology of phosphite and nonylphenyl, which is applied in the field of testing the content of triphosphite, and achieves the effect of strong anti-interference ability

Pending Publication Date: 2020-08-07
中山永恒检测科技有限公司
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] At present, most of the test methods are used to test the content of phosphorus to evaluate the presence of tris(nonylphenyl)phosphite, but there is no standard method for directly quantifying the content of tris(nonylphenyl)phosphite

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  • Method for testing content of tris (nonylphenyl) phosphite
  • Method for testing content of tris (nonylphenyl) phosphite
  • Method for testing content of tris (nonylphenyl) phosphite

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Embodiment 1

[0025] The present invention proposes a method for testing three (nonylphenyl) phosphite content, comprising the following steps:

[0026] A. Weigh 1g (accurate to 1 / 10,000) sample, put it into a brown glass sample bottle, accurately add 10mL dichloromethane to the sample bottle, tighten the bottle cap, put the sample bottle on the special shelf for ultrasound, and put In the ultrasonic pool, at room temperature, set the ultrasonic power to 300W, continue ultrasonic extraction for 1 hour, take out the sample bottle, and let it cool naturally to room temperature for use.

[0027] B. Centrifuge the extracted sample at a speed of 5000rpm / min for 10min, take 2mL of the supernatant, blow it to near-dryness with nitrogen under heating conditions at 70°C, add 2mL of methanol to redissolve, hold the test tube and sonicate for 1 minute to fully mix the solution, and then use a vortex Rotate the shaker for 1 minute to make the mixing more thorough.

[0028] C. Use a 0.22 μm organic pha...

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Abstract

The invention provides a method for testing the content of tris (nonylphenyl) phosphite, which comprises the following steps: A, weighing a sample, adding an organic solvent into the sample, and carrying out ultrasonic extraction in an ultrasonic tank to obtain an extract; B, centrifuging the extracting solution, taking supernatant, blowing nitrogen to be nearly dry, adding methanol for redissolving, and enabling the volume of the methanol to be the same as that of the supernatant; C, filtering the methanol redissolved solution into a sample bottle by using an organic phase filter membrane; and D, testing by using a high performance liquid chromatography-diode array detector combination instrument. The high performance liquid chromatograph diode array detector has high selectivity and response value to tris (nonylphenyl) phosphite, can perform qualitative and quantitative detection, and has strong anti-interference capability. The method provided by the invention is simple and rapid, and can be used for accurately, qualitatively and quantitatively determining the content of tris (nonylphenyl) phosphite in the sample.

Description

technical field [0001] The invention relates to a method for testing the content of tris(nonylphenyl)phosphite. Background technique [0002] Tris(nonylphenyl)phosphite, as a general-purpose antioxidant, is widely used in rubber industry, plastic industry and other fields. It has high thermal oxygen stabilization efficiency and can effectively inhibit the oxidation and discoloration of polymer materials. Styrene, styrene-butadiene rubber, epoxy resin, unsaturated polyester, SBS, natural rubber, butadiene rubber, ABS and other non-polluting antioxidants, and can produce excellent synergy with phenolic antioxidants, The anti-aging effect is greatly improved. On July 16, 2019, the European Chemicals Agency (ECHA) officially announced the 21st batch of SVHC candidate substances in the REACH regulation, adding 4 new substances to the list of candidate substances of very high concern (SVHCs). [0003] At present, most of the test methods use the phosphorus content to evaluate wh...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/86
CPCG01N30/02G01N30/06G01N30/8686G01N2030/062
Inventor 黄炯辉陈丽红陈晓伟
Owner 中山永恒检测科技有限公司
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