TY  - RPRT
TI  - On-line solid phase extraction with polyurethane foam: trace level spectrophotometric determination of iron in natural waters and biological materials.
AU  - Ricardo J Cassella
PY  - 2002
DO  - 10.1039/b204700d
UR  - https://pubmed.ncbi.nlm.nih.gov/12195994/
ID  - 12195994
ER  -