Reference material for analysis of triphenyl phosphate in polyvinyl chloride

Reference material for analysis of triphenyl phosphate in polyvinyl chlorideThis standard substance is mainly based on polyvinyl chloride（PVC）Triphosphatebenzeneester（TPP）Developed for the requirements of content detection and daily sample content, it can be used as a method for precision evaluation and quality control in related analysis and testing processes.

Onesample preparation

This standard substance is importedPolyvinyl chloride（PVC）As a matrix, the diffusion agent, stabilizer, and target substance are mixed in a mature and stable process ratio in a high-speed mixing equipment to uniformly adsorb the additive raw materials. Through special homogenization methods, the temperature and vacuum conditions of each section are strictly controlled in the high-speed mixing equipment to melt, shear, reflux, and transport to achieve good dispersibility plasticization. Strictly control the traction speed and cutter clearance to ensurePVCUniformly prepare the particles and divide the samples into glass bottles in a clean room for dark storage.

IICharacteristic values and uncertainties

The uncertainty assessment of the characteristic values of this standard substance mainly considers the uncertainty components introduced by the joint determination of multiple laboratories, as well as the uncertainty components introduced by the uniformity and stability tests of the standard substance.

IIIUniformity testing and stability assessment

Reference standard materialrelatedTechnical specifications require randomly selecting standard substance samples after packaging,Reference standardsGB/T42696-2023The conditions for the determination of phosphate ester compounds in textiles,adoptUltrasonic extraction with ethyl acetate60min，gas chromatography-Tandem mass spectrometry（GC-MS）Conduct uniformity and stability tests, specifying a minimum sampling size of0.35gThe results indicate that the standard substance has good uniformity and stability. The validity period of this standard substance is from the date of self determination3Year. The research and development unit will continue to track and test the stability of the standard substance. If any changes in the value are found within the validity period, the user will be notified in a timely manner.

4Traceability and value determination methods

This standard substance is calibrated using a joint calibration method from multiple laboratories. The calibration method is as follows:Ultrasonic extraction with ethyl acetate60min，gas chromatography-Tandem mass spectrometry（GC-MS）Measurement solutionBy using measurement methods and instruments that meet the requirements of metrological characteristics, the traceability of characteristic values of standard substances is ensured.

FivePackaging, Storage, and Use

Reference material for analysis of triphenyl phosphate in polyvinyl chlorideThis standard substance is packaged in screw mouth glass bottles, with each bottle10g, granular. Store in a dark, clean, and room temperature place; Strictly prevent contamination during opening and use. The minimum sampling size is specified as0.35gPlease do not use below this sampling amount.