CHEMICAL ANALYSIS;
CHEMICAL STRUCTURE;
CHROMATOGRAPHY;
CLINICAL CHEMISTRY;
CONTROLLED STUDY;
DRUG BLOOD LEVEL;
DRUG INDUSTRY;
DRUG SALIVA LEVEL;
DRUG URINE LEVEL;
FOOD ANALYSIS;
GAS CHROMATOGRAPHY;
GEL PERMEATION CHROMATOGRAPHY;
HEALTH CARE;
HIGH PERFORMANCE LIQUID CHROMATOGRAPHY;
HORSE;
HUMAN;
ION MONITORING;
ISOTOPE DILUTION ASSAY;
LIGHT SCATTERING;
MASS SPECTROMETRY;
NONHUMAN;
POLLUTANT;
QUANTITATIVE ANALYSIS;
REVIEW;
SOLID PHASE EXTRACTION;