气相色谱法分析阳离子醚化剂中残存的环氧氯丙烷和1,3-二氯丙醇

建立了液体阳离子醚化剂中残存的环氧氯丙烷、1,3-二氯丙醇的气相色谱分析法。用苯甲酸甲酯萃取样品,对两组分都有很高的萃取率。选用HP-5 30　m毛细管柱,一次进样能同时测定两组分,两组分达到完全分离,且均在萃取剂前出峰,因而减少了峰扩散,提高了检测灵敏度。检测的线性范围:环氧氯丙烷5～590 mg/kg，1,3-二氯丙醇21～480 mg/kg；检测限:环氧氯丙烷1.2 mg/kg，1,3-二氯丙醇2.2 mg/kg；回收率：环氧氯丙烷95.93%～103.42%，相对标准偏差(RSD)2.4%～10.

Determination of Residual Epichlorohydrin and Sym-Dichloroisopropyl Alcohol in Cationic Etherified Reagent by Gas Chromatography

A method for the determination of the residual epichlorohydrin and sym-dichloroisopropyl alcohol in cationic etherified reagent by gas chromatography has been established. (Methyl) benzoate, which has high extraction efficiency for the two components, was used as (extractant.) With an HP-5 capillary column, the two components were baseline separated and they (eluted) before the extractant. The linear ranges achieved were 5 - 590 mg/kg for (epichlorohydrin) and 21 - 480 mg/kg for sym-dichloroisopropyl alcohol. The limits of detection were 1.2 mg/kg for epichlorohydrin and 2.2 mg/kg for sym-dichloroisopropyl alcohol. Recoveries for epichlorohydrin were (95.93%)- 103.42% with relative standard deviations of 2.4%- 10.6% and those for sym-dichloroisopropyl alcohol were 98.54%-107.40% with relative stan-(dard) deviations of 6.6%-(11.1%). The method is simple, fast, and convenient.