TY  - JOUR 
T1  - Simultaneous quantification of amphetamines and ephedrines in urine by GC/MS using analytical-grade acetic anhydride/pyridine as derivatizing reagents: a suitable approach to reduce costs of routine analyses
JO  - Journal of the Brazilian Chemical Society
A1  - Bergo, Patrícia L. de Souza
A1  - Correa, Joane M.
A1  - Nagem, Tanus J.
A1  - Augusti, Rodinei
A1  - Nascentes, Clésia C.
SN  - 0103-5053
UL  - 10.1590/S0103-50532009000200021
VL  - 20 
Y1  - 2009
PB  - Brasil 
ER  -