期刊
ANALYTICA CHIMICA ACTA
卷 558, 期 1-2, 页码 158-163出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2005.11.036
关键词
electroanalysis; cyanide; gold; physiological; sensor; amperometric
Hydrogen cyanide gas produced during fires can cause poisoning from smoke inhalation. Blood cyanide concentrations in healthy subjects are sub-micromolar. Toxic or fatal blood concentrations are generally considered to be greater than 40 mu mol dm(-3) but concentrations in survivors can exceed 200 mu mol dm(-3), while values exceeding 400 mu mol dm(-3) have been recorded from fatalities. Cyanide in blood is either free in plasma or bound to ferric haemoglobin. Current analytical techniques require sample pre-treatment, generally with extraction of the cyanide from the sample. An amperometric test was developed which could determine free cyanide at physiological pH in a solution of albumin and other blood constituents without sample pre-treatment, with a calibration range exceeding 400 mu mol dm(-3) and a limit of detection (LOD; using three standard deviations) of 4 mu mol dm(-3) which is lower than would be treated clinically. (c) 2005 Elsevier B.V. All rights reserved.
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