Initial Reports Volume 187
Chapter 2, Table T3. X-ray fluorescence operating conditions during XRF analyses.

Notes: All major elements measured using a rhodium X-ray tube operated at 30 kV and 80 mA. Trace elements are measured using a rhodium X-ray tube operated at 60 kV and 50 mA. FPC = flow-proportional counter (P10 gas); Scint = NaI Scintillation counter.

								Count time	
Oxide 					Peak angle	Background offset		Peak	Background
or element	Line 	Crystal 	Detector 	Collimator	(degrees 2 theta)	(degrees 2 theta)		(s)	(s)

Major element (wt%)									
SiO2 	Kappa alpha	PET 	FPC 	Medium 	109.21		40		
TiO2 	Kappa alpha	LIF200 	FPC 	Fine 	86.14		40		
Al2O3 	Kappa alpha	PET 	FPC 	Medium 	145.12		100		
Fe2O3 	Kappa alpha	LIF200 	FPC 	Fine 	57.52		40		
MnO 	Kappa alpha	LIF200 	FPC 	Fine 	62.97		100		
MgO 	Kappa alpha	TLAP 	FPC 	Medium 	45.17	+/-0.80 	150	150	
CaO 	Kappa alpha	LIF200 	FPC 	Medium 	113.09	  	40	
Na2O 	Kappa alpha	TLAP 	FPC 	Medium 	54.10	-1.20 	150	150
K2O 	Kappa alpha	LIF200 	FPC 	Medium 	136.69		100	
P2O5 	Kappa alpha	GE111 	FPC 	Medium 	141.04		100	

Trace element (ppm)								
Rh 	Kappa alpha Compton	LIF200 	Scint 		18.58		60	
Nb 	Kappa alpha	LIF200 	Scint 	Fine 	21.40	+0.35	200	100
Zr 	Kappa alpha	LIF200 	Scint 	Fine 	22.55	-0.35 	100	50
Y 	Kappa alpha	LIF200 	Scint 	Fine 	23.80	-0.40 	100	50
Sr 	Kappa alpha	LIF200 	Scint 	Fine 	25.15	-0.40 	100	50
Rb 	Kappa alpha	LIF200 	Scint 	Fine 	26.62	-0.60 	100	50
Zn 	Kappa alpha	LIF200 	Scint 	Medium 	41.81	-0.55 	100	50
Cu 	Kappa alpha	LIF200 	Scint 	Fine 	45.03	-0.55 	100	50
Ni 	Kappa alpha	LIF200 	Scint 	Medium 	48.67	-0.60 	100	50
Cr 	Kappa alpha	LIF200 	FPC 	Fine 	69.35	-0.50 	100	50
V 	Kappa alpha	LIF220 	FPC 	Fine 	123.06	-0.50 	100	50