Method for detecting impurities in medical PVC sheet processing auxiliary materials

Abstract

The invention discloses a method for detecting impurities in medical PVC (polyvinyl chloride) sheet processing auxiliary materials. The method comprises the following steps: preparing a vinyl chloride control solution; preparing a test solution by using a medical PVC sheet and processing auxiliary materials thereof; preparing a blank solution; setting gas chromatography test conditions; carrying out gas chromatography detection on the blank solution without vinyl chloride and the vinyl chloride contrast solution under set conditions to obtain a qualitative spectrum of vinyl chloride; the method comprises the following steps: carrying out gas chromatography detection on a test solution under set conditions, recording a spectrum, comparing the spectrum with a qualitative spectrum of vinyl chloride to obtain an impurity peak overlapped with the peak appearance position of vinyl chloride, calculating the area of the corresponding impurity peak, and comparing the area of the corresponding impurity peak with the area of a vinyl chloride peak to measure the corresponding impurity and convert the corresponding impurity into the content of vinyl chloride. The method is simple and easy to implement, provides good technical support for quality control and safety detection of medical PVC sheet products, and has good economic and social benefits.

Description

technical field [0001] The invention relates to the field of detection, in particular to a method for detecting impurities in medical PVC sheet processing auxiliary materials. Background technique [0002] PVC (polyvinyl chloride) resin is one of the most widely used thermoplastics in the world today, because its products have good mechanical properties and electrical properties, and excellent flame retardancy, transparency, chemical resistance and other properties. It has been widely used in building materials, vehicles, machinery, electronics, electrical appliances, medical treatment and many other aspects, especially in the medical field in recent years. Due to the low cost, wide application range and easy processing of the resin, the market demand Obviously, the proportion is expanding year by year, and about 25% of medical plastic products are PVC. [0003] Medically applied PVC products include hemodialysis tubing, breathing masks, oxygen inhalation tubes, and pharmac...

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Problems solved by technology

[0006] The purpose of the present invention is to: for the existing medical PVC sheet material vinyl chloride monomer detection method that exists in the prior art, the impurity separation degree in the PVC sheet material is low, and the impurity separation is not ideal, resulting in the detection of residual vinyl chloride in medical PVC sheet products To solve the problem of high value, provide a detection method for impurities in medical PVC sheet processing accessories

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