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2-氯丁二烯(Chloroprene)为无色和极易挥发的液体,有特殊刺激性臭味,易聚合为二聚体或多聚体,为制造合成橡胶(氯丁橡胶)的中间体。测定微量的2-氯丁二烯目前尚无满意的方法。目前应用的有燃烧法及对苯二胺重氮盐法。前者为测定卤代烃的一般方法。有机物经燃烧(燃烧炉或燃烧灯)破坏后,用比浊法测定燃烧时生成的氯(可以用亚砷酸钠溶液吸收并使之还原成氯离子)含量。此法需一定的仪器设备,手续较烦。对苯二胺重氮盐比色
Chloroprene is a colorless and highly volatile liquid with a special irritating odor and easily polymerizes into dimers or multimers. It is an intermediate in the manufacture of synthetic rubber (neoprene). There are currently no satisfactory methods for the determination of trace amounts of 2-chloroprene. At present there are combustion method and para-phenylenediamine diazonium salt method. The former is a general method for the determination of halogenated hydrocarbons. After the organic matter has been destroyed by combustion (burner or burner), the content of chlorine (which can be absorbed by sodium arsenite solution and reduced to chloride ion) is measured by turbidimetry. This method requires a certain amount of equipment, procedures more trouble. Phenylenediamine diazonium salt colorimetric