连续流动法测定沉积物中的酸挥发性硫化物  

Continuous Flow Method for the Determination of Acid Volatile Sulfide in Sediments

作　　者：蔡晔[1] 林休休[2] 

机构地区：[1]苏州市环境监测中心,江苏苏州215004 [2]苏州市职业大学,江苏苏州215104

出　　处：《环境科技》2015年第3期56-59,共4页Environmental Science and Technology

基　　金：国家"十二五"水体污染控制与治理科技重大专项资助(2012ZX07506-003)

摘　　要：优化沉积物中酸挥发性硫化物(Acid Volatile Sulfide,AVS)的提取方法并采用连续流动分析法检测提取液中的硫化物。研究了吸收液的种类、氮气流量与吹气的时间和反应温度对AVS提取效果的影响以优化提取方法。结果表明,与传统的氢氧化钠或硫酸镉-氢氧化钠吸收液相比,以氯化锌-羧甲基纤维素钠溶液为吸收液吸附效率好,稳定性高且无毒。用连续流动分析法检测提取液中的AVS快速、准确、稳定性好。This study described extracting acid volatile sulfide from sediments, and detecting the sulfide in the digestion solution by continuous flow analysis. The optimum analytical conditions were determined by improving the experimental apparatus and optimizing the absorbing liquid, nitrogen flow rate, reaction temperature and time. The results showed thatzinc chloride-sodium carboxymethyl cellulose solution was the most effective absorbing liquid,compared with traditional absorbing liquid like sodium hydroxide and cadmium sulfate-sodium hydroxide. The continuous flow analysis determination of the concentration of AVS was fast,accurate and stable.

关 键 词：连续流动分析法 酸挥发性硫化物 沉积物 优化 

分 类 号：X8[环境科学与工程—环境工程]