CTA	cellulose triacetate
CV-AAS	Cold vapor atomic absorption spectroscopy
CV	cross-validation
E	Enrichment factor
F-AAS	Flame atomic absorption spectroscopy
F-IR	Far infrared spectroscopy
FTIR	Fourier-transform infrared spectroscopy
GF-AAS	Electrothermal or graphite furnace atomic absorption spectroscopy
HG-AAS	Hydride generation atomic absorption spectroscopy
ICP-MS	Inductively coupled plasma mass spectrometry
ICP-OES	Inductively coupled plasma optical emission spectroscopy
IR	infrared spectroscopy
Kelex 100	8-hydroxyquinoline derivative
LD	limit of detection
LQ	limit of quantitation
MEDUSA	Make Equilibrium Diagrams Using Sophisticated Algorithms software
MES	4-morpholino ethanesulfonic acid
MID-IR	Mid infrared spectroscopy
NAS	Net analyte signal
NIR-IR	Near infrared spectroscopy
NPOE	2-nitrophenyl octyl ether
PIM	polymer inclusion membrane
PLS	partial least squares
RMSEC	root mean square error of calibration
RMSECV	root mean square error of cross-validation
RSD	Relative standard deviation
TRIS	Tris(hydroxymethyl)aminomethane
VIS	visible spectroscopy