Determination of Cd and Zn by isotope dilution–thermal ionisation mass spectrometry using a sequential analysis procedure

Isotope dilution–thermal ionisation mass spectrometry (ID-TIMS) was used to examine the certified Cd and Zn content of 4 Certified Reference Materials (CRMs); 2 soils: GBW07401 and GBW07405, 1 plant CRM060 and an animal tissue SRM1566a. The CRMs were chosen to be of contrasting origin and Cd:Zn cont...

Full description

Saved in:
Bibliographic Details
Published in:Talanta (Oxford) 2002-05, Vol.57 (2), p.405-413
Main Authors: Ayoub, Ahmed S, McGaw, Brian A, Midwood, Andrew J
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
Isotope dilution-mass spectrometry
Spectrometric and optical methods
TIMS
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Isotope dilution–thermal ionisation mass spectrometry (ID-TIMS) was used to examine the certified Cd and Zn content of 4 Certified Reference Materials (CRMs); 2 soils: GBW07401 and GBW07405, 1 plant CRM060 and an animal tissue SRM1566a. The CRMs were chosen to be of contrasting origin and Cd:Zn content. Three digestion procedures were compared: (i) an open tube aqua regia procedure (ii) microwave digestion using Teflon bombs and (iii) hydrofluoric acid (HF) digestion using PTFE bombs. The Cd and Zn levels obtained using ID-TIMS all fell within the published certified range for the CRMs. This was the case regardless of the digestion procedure used, although HF digestion tended to yield marginally higher levels than the other procedures and in one instance, Cd in GBW07401, was significantly different ( P
ISSN:0039-9140
1873-3573
DOI:10.1016/S0039-9140(02)00019-X