Application of edta to direct graphite-furnace atomic absorption analysis for cadmium in sea water |
| |
| Authors: | Roger Guevremont RE Sturgeon SS Berman |
| |
| Institution: | Atlantic Regional Laboratory, National Research Council of Canada, 1411 Oxford Street,Halifax, Nova Scotia B3H 3Z1 Canada;Division of Chemistry, National Research Council of Canada, Montreal Road, Ottawa,Ontario K1A OR9 Canada |
| |
| Abstract: | A method is described for the direct determination of cadmium in undiluted sea water by graphite-furnace atomic absorption spectrometry. The addition of EDTA ( 1 mg ml-1) reduces the temperature of atomization of cadmium to far below that of volatilization of other matrix components. The need for very careful temperature control and accurate background compensation is thus minimized. Sea water was analyzed by the method of standard additions. A detection limit of 0.01 μg l-1, a sensitivity of 0.034 μg l-1 and a precision of ±10% at the 0.05 μg l-1 level were obtained for 20-μl injections. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
