A method for testing red phosphorus content in polymer

Abstract

The invention discloses a method for measuring the content of red phosphorus in a polymer. The content of red phosphorus in the polymer is tested by jointly adopting TG-FTIR-GC / MS, cracked gas obtained after cracking in TG continuously enters FT-IR and GC / MS to be measured in real time, cracked gas absorption peaks at different time points can be analyzed through a spectrum obtained through FT-IR continuous measurement, and then interference of an organic phosphorus flame retardant is effectively eliminated. By means of a GC / MS mass spectrum and an ionic spectrum, initial component determination on red phosphorus can be conducted, and the red phosphorus cracking temperature point can be found out. Separation determination is conducted on the cracked gas sample according to the temperature point calculated out in the on-line mode of jointly adopting the three methods, part of cracked gas in the segment at the temperature point is extracted to enter a chromatographic column for a temperature increasing procedure, and quantitative analysis is conducted on the sample according to the height of a chromatographic peak at the red phosphorus retention time. According to the method, the sample is directly taken to be measured, the pretreatment process is shortened, and the false positive judgment risk is reduced.

Description

technical field [0001] The invention relates to the field of chemical analysis, in particular to a method for testing the content of red phosphorus in polymers. Background technique [0002] In actual production and life, in order to improve the combustion performance of flammable and combustible materials, prevent fires, and protect people's lives and property, flame retardants are widely used in various electronic products and decoration materials. Including inorganic flame retardants and organic flame retardants. According to the flame retardant elements contained, it can be divided into brominated flame retardants, chlorine flame retardants, phosphorus flame retardants, nitrogen flame retardants and so on. [0003] Taking phosphorus-based flame retardants as an example, there are both organic phosphorus flame retardants such as triphenyl phosphate and inorganic phosphorus-based flame retardants such as red phosphorus. With the increasing requirements for environmental ...

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Problems solved by technology

[0008] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for testing the content of red phosphorus in polymers, aiming to solve the problems of high false positive risk and certain limitations of the existing methods

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