Sample treatment:
- Pulverized sample (40 mg) + Lithium metaborate (80 mg) 
- Fusion at 1100°C in a graphite crucible (30 min)
- Molted drop poured in HNO3 5% (V/V) and diluted to 250 ml with ultrapure water  

Instrument: Perkin Emer Optima 7000
Reading view: axial (trace elements); radial (major and minor elements)
Nubulizer: Perkin-Elmer gem tip nebulizer with Shott spray chamber


	Wl (nm)	LOQ (ox wt%)
Al		0.05 
Ca		0.05
Fe		0.13
K		0.85
Mg		0.003
Na		0.72	
Ti		0.03
	
		LOQ (PPM)
Ba		10	
Cr		5	
La		2	
Mn		27	
Rb		8	
Sc		1	
Sr		1	
Y		0.3	
Yb		3	
Zr		4