Preconcentration of submicrogram amounts of nickel by liquid-liquid extraction and micro back-extraction from water for graphite furnace atomic absorption spectrometry
✍ Scribed by Y. Shijo; T. Shimizu; T. Tsunoda; Tao Shiquan; M. Suzuki
- Publisher
- Elsevier Science
- Year
- 1991
- Tongue
- English
- Weight
- 344 KB
- Volume
- 242
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
The effective preconcentration of submicrogram amounts of nickel from water is described. Nickel is extracted into xylene as a dithiocarbamate complex and subsequently back-extracted into 100 ~1 of nitric acid for graphite furnace atomic absorption spectrometry. Conditions for quantitative extraction and back-extraction are described. Data on interferences,
precision and detection limits are presented. Sub-pg 1-l levels of nickel in water could be determined with concentration factors of 500-1000 by the proposed method. The concentrations of nickel in rain water and surface snow were found to be 0.39 and 0.19 pg l-t, respectively.
The limit of determination can be lowered by using concentration factors larger than 104, nickel determination at ng 1-l levels being feasible.