Atomic absorptiometric determination of arsenic in sea water by hydride generation after separating by flotation
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- NAKASHIMA Susumu
- Institute for Agricultural and Biological Sciences, Okayama University
Bibliographic Information
- Other Title
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- 浮選分離‐還元気化原子吸光法による海水中のひ素の定量
- フセン ブンリ カンゲン キカ ゲンシ キュウコウホウ ニヨル カイスイチュウ
- 浮選分離-還元気化原子吸光法による海水中のヒ素の定量
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Abstract
A rapid and precise method is described for the separation and determination of arsenic in natural sea water. The procedure is as follows: Add 2 ml of iron (III) solution (5 mg ml-1) to 250 ml of sea water in a 300-ml beaker. Adjust the pH to 89with aqueous ammonia solution, and stir the solution for 15 min. After adding 1 ml of sodium oleateethanol solution (1 mg ml-1), transfer the contents of the beaker to a flotation cell (24×4.8 cm i.d.) fitted with a sintered-glass filter (No.4). Pass air at 50 ml min-1 from the lower end of the cell about 1 min. Suck off the mother liquor through the sinteredglass disk. Add 5 M hydrochloric acid to dissolve the precipitate, collect the filtrate by suction in a 10-ml calibrated flask and dilute to 9 ml. Add 0.5 ml of 20% (w/v) potassium iodide solution into the flask prior to analysis and dilute to the mark with water. Transfer 1 ml of 5 % (w/v) sodium borohydride solution into a hydride generating cell. Inject 1 ml of sample solution containing less than 0.10 μg of arsenic into the cell. Sweep the arsine thus generated into the long absorption cell (60×1.2 cm i.d.) with nitrogen so that it is atomized in the nitrogen-hydrogen flame and measure the absorption signal of arsenic by atomic absorption spectrophotometry. The potassium iodide pretreatment after the separation eliminated suppressive effects by diverse ions such as Cu2+, Se4+ and Ni2+ in the determination of arsenic. In the analytical process, mean recoveries were (99101) % for arsenic (III, V) added to natural sea waters. The relative standard deviations of 7 replicate analyses of sea water samples were less than 3%.
Journal
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- BUNSEKI KAGAKU
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BUNSEKI KAGAKU 28 (9), 561-563, 1979
The Japan Society for Analytical Chemistry
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Details 詳細情報について
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- CRID
- 1390282679332564096
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- NII Article ID
- 110002910224
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- NII Book ID
- AN00222633
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- COI
- 1:CAS:528:DyaL3cXkslSktw%3D%3D
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- NDL BIB ID
- 2064727
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- ISSN
- 05251931
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- NDL-Digital
- CiNii Articles
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- Abstract License Flag
- Disallowed