TY  - JOUR 
T1  - A novel method for fast enrichment and monitoring of hexavalent and trivalent chromium at the ppt level with modified silica MCM-41 and its determination by inductively coupled plasma optical emission spectrometry
JO  - Química Nova
A1  - Ganjali, Mohammad Reza
A1  - Babaei, Leila Hajiagha
A1  - Badiei, Alireza
A1  - Saberian, Kamal
A1  - Behbahani, Seiedmahmoudreza
A1  - Ziarani, Ghodsi Mohammadi
A1  - Salavati- Niasari, Masoud
SN  - 0100-4042
UL  - 10.1590/S0100-40422006000300007
VL  - 29 
Y1  - 2006
PB  - Brasil 
ER  -