Química Nova | |
Factorial design used on the extraction and fixation of acid volatile sulfides (AVS) from sediment samples | |
Quinaia, Sueli Pércio1  Universidade Federal do Paraná, Curitiba, Brasil1  Schnitzler, Danielle Caroline1  Universidade Estadual do Centro-Oeste, Guarapuava, Brasil1  Grassi, Marco Tadeu1  | |
关键词: factorial design; sediments; AVS.; | |
DOI : 10.1590/S0100-40422009000500038 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
The AVS is defined operationally as acid volatile sulfide, which is a controlling phase on the partition of some metallic species in sediments. A Factorial design was evaluated by means of 16 experiments and using four variables: temperature, extraction time, N2 flow, and volume of the S2- collection solution. The factors that contributed to the efficiency of the process were the extraction time and the N2 flow. Trapping of S2- was efficient in AAB. The S2- was quantified using a potentiometric procedure. Recovery tests for S2- concentrations varying from 1×10-5 to 1×10-4 mol L-1 were in the range from 93 to 116%.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912050594567ZK.pdf | 502KB | download |