ISSN:
0941-1216
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Ultratrace Analysis in High Purity Phosphorus by Thermal Trace-matrix-separation via ETV-ICP-MSElemental (red) phosphorus can be effectively volatilized and separated from ultra trace contaminants by electrothermal vaporization (ETV) in a graphite furnace. The tube must be covered with WC and some hydrogen added to the transport argon. Detection limits of 0,01 to 10 ng/g in the phosphorus sample are obtained for most analytes by ICP-MS in single ion monitoring mode. Exceptions are some carbide forming elements (B, Si, V), some contaminants from the graphite (B, Si) and some easily volatile traces (As, Sb, Te, I). ETV in multi element scan mode or alternatively wet chemical trace matrix separation (SMT) with an cation exchanger plus nebulizer aspiration allow detection limits about one order higher. The proposed technique requires a minimum of chemical manipulation and therefore reduces risk of contamination.
Additional Material:
3 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19943360505
