INFLUENCE OF CONDITIONING AGENTS ON THE DETERMINATION OF METALLIC CONTENT OF SEWAGE SLUDGE BY ATOMIC-ABSORPTION SPECTROPHOTOMETRY WITH ELECTRO-THERMAL ATOMIZATION

被引:4
作者
CARRONDO, MJT
PERRY, R
LESTER, JN
机构
关键词
Cadmium; chromium; copper; nickel; lead and zinc determination; Electrothermal atomic-absorption spectrophotometry; Interferences; inorganic and polyelectrolyte conditioners; Sewage sludge analysis;
D O I
10.1039/an9790400937
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Conditioning agents are often used to aid the de-watering of sewage sludges prior to disposal to agricultural land. These might interfere in the electrothermal atomic-absorption spectrophotometric analysis of heavy metals. Possible interferences by inorganic and polyelectrolyte conditioners were studied at the higher rates of addition normally used in sewage practice. Analyses for cadmium, chromium, copper, nickel, lead and zinc were performed by flame and electrothermal atomisation methods in conditioned and unconditioned samples. The organic polyelectrolytes tested did not interfere, nor did most inorganic conditioners at rates of addition consistent with normal sewage treatment practice. However, interferences occurred with aluminium chlorohydrate at normal and very high addition rates, and with other inorganic conditioners at very high addition levels.
引用
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页码:937 / 943
页数:7
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