caa a22 4500 465746187 CHVBK 20180323111821.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00332253 doi (NATIONALLICENCE)springer-10.1007/BF00332253 On-line preconcentration of silver on activated alumina and determination in borehole water by flow injection atomic absorption spectrophotometry [Elektronische Daten] [P. Coetzee, I. Taljaard, H. de Beer] Summary: A micro column of activated alumina in the basic form was used in conjunction with flame atomic absorption for the preconcentration and determination of silver in borehole water. The silver was accumulated on the alumina column by pumping sample solution at pH 4 through the column at a rate of 5 cm3 min-1 for 5 min. By incorporating an injection valve and a simple interfacing device into the system, silver was determined by elution into the nebulizer of an atomic absorption spectrophotometer with 500 μl of 2 mol l-1 nitric acid. Regeneration of the alumina to its basic form was achieved by 0.15 mol l-1 ammonia solution pumped through the column at 5 ml min-1 for 2 min. A detection limit of 4 μg l-1 was measured, based on a sample volume of 25 ml. The relative standard deviation was less than ±5% at concentration levels above 10 μg l-1. Springer-Verlag, 1990 Coetzee P. P. O. Box 524, 2000, Johannesburg, Republic of South Africa aut Taljaard I. P. O. Box 524, 2000, Johannesburg, Republic of South Africa aut de Beer H. P. O. Box 524, 2000, Johannesburg, Republic of South Africa aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/3(1990-01-01), 201-204 0937-0633 336:3<201 1990 336 216 https://doi.org/10.1007/BF00332253 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00332253 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Coetzee P. P. O. Box 524, 2000, Johannesburg, Republic of South Africa aut NATIONALLICENCE 700 1- Taljaard I. P. O. Box 524, 2000, Johannesburg, Republic of South Africa aut NATIONALLICENCE 700 1- de Beer H. P. O. Box 524, 2000, Johannesburg, Republic of South Africa aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 336/3(1990-01-01), 201-204 0937-0633 336:3<201 1990 336 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer