1.
2.
Analyst
; 116(10): 1059-61, 1991 Oct.
Article
in English
| MEDLINE
| ID: mdl-1801602
ABSTRACT
A method for determining microgram amounts of tin(II) in synthetic samples containing tin(IV) and in dental gels has been developed. The procedure involves the oxidation of tin(II) with iron(III) in hydrochloric acid and spectrophotometric determination of the resulting iron(II) as a FerroZine complex.
Subject(s)
Cariostatic Agents/chemistry , Gels/chemistry , Tin/analysis , Microchemistry , Spectrophotometry/methods
3.
Talanta
; 32(2): 115-8, 1985 Feb.
Article
in English
| MEDLINE
| ID: mdl-18963805
ABSTRACT
Nitrate and nitrite in natural waters are determined spectrophotometrically by passage through an amalgamated zinc reductor at pH 3.4 into iron(III)-Ferrozine solution. Interference by high levels of nitrite is eliminated by treatment with azide. Levels as low as 0.2 mug ml (expressed as nitrogen) can be determined with a precision of +/- 3%.
