吡咯烷二硫代甲酸铵纤维素的表征及其填充小柱法采集大气中的铅

Characterization of Ammonium Pyrrolidine Dithiocarboxylate Chelating Cellulose and Its Use for Determination of Trace Amount of Lead in Air

将优良的重金属螯合剂－吡咯烷二硫代甲酸铵（ＡＰＤＣ）通过间接醚化法接枝到自然界分布广泛的棉纤维上，制成了性能优越、成本低廉的ＡＰＤＣ螫合纤维素（ＣＣ－ＡＰＤＣ），并对其结构及吸附性能进行了表征。首次用ＣＣ－ＡＰＤＣ填充小柱法采集测定大气中的铅。方法简便、快速，准确度、精密度均很好，是对大气中测铅的常规环境监测方法的改进。

Chelating cellulose(CC) of excellent nature and low cost is made by grafting the chelating reagent ammonium pyrrolidine dithiocarboxylate (APDC) to cotton by indirect etherification. The structure and adsorption behavior of CC-APDC is characterized. A small column filled with CC-APDC is used for the first time to catch trace amount of lead in air for its determination. Results have shown that this method has high precision and accuracy. Being rapid and simple, it is superior to the present environmental monitoring method of lead.