Determination of mercury in sewage sludge by direct slurry sampling graphite furnace atomic absorption spectrometry |
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| Institution: | 1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;2. State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, China;1. Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece;2. Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece |
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| Abstract: | Ultrasonic slurry sampling electrothermal atomic absorption spectrometry (ETAAS) method was elaborated to the determination of Hg in sewage sludge samples with the use of KMnO4+Pd modifier. The minimum sample amount required for slurry preparation with respect to sample homogeneity was evaluated by weighting masses between 3 and 30 mg directly into the autosampler cups. Validation of the proposed method was performed with the use of Certified Reference Materials of sewage sludge, CRM 007-040 and CRM 144R. Two sewage sludge samples from Poznañ (Poland) city were analysed using the present direct method and a method with sample digestion, resulting in no difference within statistical error. |
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