TY  - RPRT
TI  - On-site calibration method based on stepwise solid-phase microextraction.
AU  - Guohua Xiong
AU  - Yong Chen
AU  - Janusz Pawliszyn
PY  - 2003
DO  - 10.1016/s0021-9673(03)00602-2
UR  - https://pubmed.ncbi.nlm.nih.gov/12885050/
ID  - 12885050
ER  -