IEC 62321-3-4:20 23规定了在电工产品聚合物中筛选邻苯二甲酸二异丁酯(DIBP)、邻苯二甲酸二正丁酯(DBP)、邻苯二甲酸苄基丁酯(BBP)、邻苯二甲酸二(2-乙基己基)酯(DEHP)的程序使用带紫外检测器的高效液相色谱(HPLC-UV)、薄层色谱(TLC)和热解吸质谱(TD-MS)。 本文件的规范性部分描述了带紫外检测器的高效液相色谱（HPLC-UV）、薄层色谱（TLC）和热解吸质谱（TD-MS）技术。傅立叶变换红外光谱（FT-IR）在本文件的信息性附件中描述。

IEC 62321-3-4:2023 specifies procedures for the screening of di-isobutyl phthalate (DIBP), di-n-butyl phthalate (DBP), benzyl butyl phthalate (BBP), di-(2-ethylhexyl) phthalate (DEHP) in polymers of electrotechnical products by using high performance liquid chromatography with ultraviolet detector (HPLC-UV), thin layer chromatography (TLC) and thermal desorption mass spectrometry (TD-MS).
High performance liquid chromatography with ultraviolet detector (HPLC-UV), thin layer chromatography (TLC) and thermal desorption mass spectrometry (TD-MS) techniques are described in the normative part of this document. Fourier transform infrared spectroscopy (FT-IR) is described in the informative annexes of this document.