Application of Sequential Injection Analysis to the Assay of Lead Retention Characteristics by Poly(vinylpyrrolidone). Trace Analysis of Lead in Waters.
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- ARAÚJO Alberto N.
- CEQUP/Serv. Quimica-Fisica, Faculdade de Farmácia
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- COSTA Rui Cerdeira C.
- CEQUP/Serv. Quimica-Fisica, Faculdade de Farmácia
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- LIMA José L. F. C.
- CEQUP/Serv. Quimica-Fisica, Faculdade de Farmácia
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Abstract
This paper presents the use of poly(vinylpyrrolidone) (PVP), which is a low-cost polymer for lead preconcentration in natural-water samples. The weak granular structure of this polymer imposed the use of a stainless-steel filter holder for its conditioning in a thin filtering layer. This unit was inserted into a sequential injection analysis system coupled to a flame atomic absorption spectrophotometer (SIA/FAAS). The developed system allows sampling rates of 16 samples/h with a 60-fold enrichment factor and a detection limit of less than 5 µg/l for a 13 ml sample volume. The performance of the present system was also assessed by carrying out recovery trials, which provided results of between 96% and 101%. The precision of the methodology developed has never been over 3% regarding RSD and 5% for the deviations to the conventional procedure.
Journal
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- Analytical Sciences
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Analytical Sciences 15 (10), 991-994, 1999
The Japan Society for Analytical Chemistry
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Keywords
Details 詳細情報について
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- CRID
- 1390001204253987584
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- NII Article ID
- 10004707924
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- NII Book ID
- AA10500785
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- COI
- 1:CAS:528:DyaK1MXms1agt74%3D
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- ISSN
- 13482246
- 09106340
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- NDL BIB ID
- 4872901
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed