DEHP, or Di(2-ethylhexyl) phthalate, is a common plasticizer widely used in plastic products, food packaging, and medical devices. Here are the testing methods for DEHP: 1. HPLC Method: High Performance Liquid Chromatography (HPLC) is used to separate and quantify DEHP in samples. This method offers high sensitivity and accuracy. 2. GC-MS Method: Gas Chromatography-Mass Spectrometry (GC-MS) separates and quantifies DEHP, suitable for samples with higher concentrations of DEHP. 3. FTIR Method: Fourier Transform Infrared Spectroscopy (FTIR) provides qualitative and quantitative analysis of DEHP by measuring absorption characteristics within the infrared spectrum to determine its presence and concentration. 4. Thermal Desorption-GC Method: This method uses Thermal Desorption-Gas Chromatography (TD-GC) to analyze solid or liquid samples containing lower concentrations of DEHP effectively. 5. LC-MS Method: Liquid Chromatography-Mass Spectrometry (LC-MS) combines the advantages of both techniques to enhance analytical sensitivity and selectivity when analyzing DEHP levels.
These are commonly used methods for testing DEHP; selecting an appropriate method depends on the nature of the sample and specific requirements. Before conducting tests, it’s essential to choose a suitable approach based on particular circumstances while ensuring the accuracy and reliability of testing equipment.