离子色谱法测定含钛分子筛生产母液中有机胺

Determination of amines by ion chromatography on the synthesis of titanium-containing molecular sieves

建立了用于含钛分子筛生产母液中有机胺含量检测的离子色谱分析方法。选用Ion Pac CS17阳离子交换分析柱,以甲基磺酸和乙腈作为淋洗液,等度洗脱,抑制电导检测,在18 min内分离检测三正丙胺和四丙基氢氧化铵。在优化的条件下,三正丙胺和四丙基氢氧化铵峰面积与其质量浓度有良好的线性关系(R2=0.9924和0.9933),检测限分别为0.042 mg/L和0.089 mg/L,加标回收率分别为98.2%和102.1%。方法适用于含钛分子筛生产母液中有机模板剂四丙基氢氧化铵及其分解产物三正丙胺的同时测定。

An ion chromatography method was developed for the determination of amines on the synthesis of titanium -containing molecular sieves. The analytical column was a DionexIonpac CS17 （250 mm × 4 mm）. The mobile phase was methylsulfonic acid containing acetonitrile. Under these conditions, the method showed a good linearity （r2 was 0. 9924 and 0. 9933 ）, and the detection limits （ S/N = 3 ） and the recoveries of TPA and TPAOH were 0.042 mg/L and 0.089 mg/L, and 98.2% and 102.1%, respectively. The proposed method can be applied to the simultaneous determination of TPAOH and TPA on the synthesis of titanium -containing molecular sieves.