TY  - JOUR 
T1  - Spectrophotometric Determination of Zinc Using 7-(4-Nitrophenylazo)-8-Hydroxyquinoline-5-Sulfonic Acid
JO  - Journal of the Brazilian Chemical Society
A1  - Korn, Maria das Graças Andrade
A1  - Ferreira, Adriana Costa
A1  - Teixeira, Leonardo Sena Gomes
A1  - Costa, Antonio Celso Spínola
SN  - 0103-5053
UL  - 10.1590/S0103-50531999000100008
VL  - 10 
Y1  - 1999
PB  - Brasil 
ER  -