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Titolo:
DETERMINATION OF TRACE-ELEMENTS IN ZINC E LECTROPLATED FILMS BY DIFFERENTIAL-PULSE ANODIC-STRIPPING VOLTAMMETRY AFTER DISSOLUTION WITH ACIDS
Autore:
KURAYASU H; INOKUMA Y; KIMOTO M;
Indirizzi:
SUMITOMO MET IND LTD,IRON & STEEL RES LABS AMAGASAKI HYOGO 660 JAPAN SUMITOMO MET TECHNOL INC AMAGASAKI HYOGO 660 JAPAN
Titolo Testata:
Bunseki Kagaku
fascicolo: 5, volume: 43, anno: 1994,
pagine: 419 - 423
SICI:
0525-1931(1994)43:5<419:DOTIZE>2.0.ZU;2-E
Fonte:
ISI
Lingua:
JPN
Keywords:
DETERMINATION OF TL, PB, CD, SN, IN, CU AND SB; ZINC ELECTROPLATED FILMS ON STEEL SHEETS; DIFFERENTIAL PULSE ANODIC STRIPPING VOLTAMMETRY; DISSOLUTION OF ELECTROPLATED FILMS WITH ACIDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
3
Recensione:
Indirizzi per estratti:
Citazione:
H. Kurayasu et al., "DETERMINATION OF TRACE-ELEMENTS IN ZINC E LECTROPLATED FILMS BY DIFFERENTIAL-PULSE ANODIC-STRIPPING VOLTAMMETRY AFTER DISSOLUTION WITH ACIDS", Bunseki Kagaku, 43(5), 1994, pp. 419-423

Abstract

A method for determining 4 approximately 80 mg m-2 of Tl, Pb, Cd, Sn,In, Cu and Sb in zinc electroplated films on steel sheets has been developed. Although (1+9)H2SO4 containing 100 mug cm-3 of NN-dimethylthiourea (Acid A) was capable of dissolving the films without dissolutionof the steel sheets, Sb was reduced in the presence of nascent hydrogen to escape as volatile SbH3 and Cu was incompletely dissolved to remain on the steel sheets. Dissolution with conc. HNO3 under cooling resulted in the complete recovery of Sb and Cu, although the steel sheetswere dissolved a little. Therefore, dissolution with Acid A was adopted for the determination of Tl, Pb, Cd, Sn and In, and conc. HNO3 for Cu and Sb. Nitric acid was removed by fuming with H2SO4 after dissolution of the films. Thallium, Pb, Cd, Sn, In, Cu and Sb were determined by differential pulse anodic stripping voltammetry according to the procedure described in a previous paper. A relative standard deviation (n=5) of about 3% was obtained. In addition, the quantities of these elements in the films were correlated with the concentrations of the elements in the electroplating baths.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 14:52:42