Quality Assurance and Control
	         
	         	
	         
	         	
		         	Analytical Matrix or Compound
		         	bulk tissue
	         	 
	         
	         	
	         
	         	
	         
	         	
		         	Primary Reference Material
		         	IAEA-CH-6
	         	 
	         
	         	
		         	Quality Control Material
		         	sea star tegument
	         	 
	         
	         	
		         	Quality Control Material Accuracy
		         	0.30
	         	 
	         
	         	
		         	Quality Control Material Precision
		         	0.30
	         	 
	         
	         	
		         	Secondary Reference Material
		         	sulfanilic acid