Table 4.

Isotope studies with CRDS.

Species	Technique	Laser	Reference
13/12C in CO2	CRDS	Near IR-External Cavity Diode Laser	[232]
13/12C in CO2	OA-CEAS	DF Diode Laser	[233]
13/12C in CO2	CRDS	Near IR Diode Laser	[234]
13/12C in CO2	OF-CEAS	DF Diode Laser	[235]
13C in CO2	NIR-CW-CRDS	DF Laser Diodes	[236]
D/H, 18O/16O	OA-ICOS	Not known	[237]
Water	WS-CRDS	Tunable Diode Laser	[238]