TY  - JOUR 
T1  - Pre-concentration of Cd(II), Cr(III), Cu(II) and Ni(II) on a column packed with free carboxymethylcellulose (CMCH)
JO  - Journal of the Brazilian Chemical Society
A1  - Padilha, Pedro de Magalhães
A1  - Rocha, Julio Cesar
A1  - Campos, Joaquim T.S
A1  - Moreira, José Celso
A1  - Federici, Cilene C
SN  - 0103-5053
UL  - 10.1590/S0103-50531997000400003
VL  - 8 
Y1  - 1997
PB  - Brasil 
ER  -