A novel silica trap for lead determination by hydride generation atomic absorption spectrometry

Korkmaz D., Ertas N., Ataman O.

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, vol.57, no.3, pp.571-580, 2002 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 57 Issue: 3
  • Publication Date: 2002
  • Doi Number: 10.1016/s0584-8547(01)00379-2
  • Journal Name: SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.571-580
  • Keywords: hydride-generation atomic absorption spectrometry, lead, silica trap, on-line enrichment
  • Middle East Technical University Affiliated: No

Abstract

A novel silica trap for lead determination at concentration levels of ng/l was developed using hydride-generation atomic absorption spectrometry. The device consists of a 7.0-cm silica tubing which is externally heated to a desired temperature. The lead hydride vapor is generated by a conventional hydride-generation flow system. The trap is placed between the gas-liquid separator and silica T tube; the device traps analyte species at 500 degreesC and releases them when heated further to 750 degreesC. The overall efficiency is 49%. The presence of hydrogen gas is required for revolatilization; O-2 gas must also be present. The analytical plot is linear up to 2.0 ng/ml for a collection period of 60 s. The response is also linear with respect to increasing collection periods up to 4 min. For 60-s trapping, the detection limit is 19 ng/l. (C) 2002 Elsevier Science B.V. All rights reserved.