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Type: Artigo de periódico
Title: Cold Vapor Atomic Absorption Determination Of Mercury By Flow Injection Analysis Using A Teflon Membrane Phase Separator Coupled To The Absorption Cell
Author: de Andrade J.C.
Pasquini C.
Baccan N.
Van Loon J.C.
Abstract: A Flow Injection Analysis (FIA) procedure for the determination of trace amounts of mercury by the Cold Vapor Atomic Absorption (CVAA) method is presented. In order to make efficient use of the FIA technique, a new flow cell was developed to permit a rapid separation of elemental mercury from the carrier solution. The design of this device is based on the permeability of Hg0 in commercially available Teflon (PTFE) tape, which acts as a membrane phase separator. The calibration curve is linear up to 70 (A = 0.005 + 0.008 Hg(;r = 0.9996) using a 15-cm open cell approach, with a detection limit of 1.4 ng. ml-1 (0.66 ng of mercury), considering a signal to noise ratio of three. The standard deviation is s = ±0.004 absorbance units, calculated at a level of 50 of Hg2+. The sampling rate was 110 samples per h. © 1983.
Rights: fechado
Identifier DOI: 10.1016/0584-8547(83)80077-9
Date Issue: 1983
Appears in Collections:Unicamp - Artigos e Outros Documentos

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