Year-end Sale % OFF 
Abstract
AbstractA calibration‐free method using portable instrumentation and thus suitable for field screening of lead in whole blood is described. Whole blood (2.5 μL) is diluted first with distilled water (5.0 μL) and then with a matrix‐modifying solution (17.5 μL) containing 0.50M HCl, 600 mg/L HgII, 5% v./v. Triton X‐100 and l00 μg/L of cadmium(II), the latter being used for performance check. A 12 μL subsample is then electrolyzed for 2 min. on a vibrating glassy carbon electrode whereby 90% of the lead(II) ions are reduced to amalgamated lead. Stripping oxidation is then performed with a constant current of 40μA. In two consecutive stripping oxidations the chemical contribution (chemical current) to the oxidation is determined facilitating calculation of the total amount of lead(II) in the sample using Coulombs law subsequent to correction for nonquantitative electrolysis. Results obtained on analysis of certified blood standards deviated less than 14 μg/L on the 3 sigma level in the concentration range 22–118 μg/L and by less than 13% on the 3 sigma level in the range 220–616 μg/L.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
