NOAA/NMFS/NWFSC/TM11:Table 4.

U.S. Dept Commerce/NOAA/NMFS/NWFSC/Publications

Table 4. Concentrations, ng/g dry weight, of selected toxic and essential elements in certified reference materials (CRMs)^a.

350 ą 110

Analytes	Analyzed value	Certified value	Analyzed value	Certified value
	DOLT		LUTS

aluminum	b	-	c	-
iron	1,400,000 ą 53,000	710,000 ą 48,000	200,000 ą 21,000	78,000 ą 6,000
chromium	460 ą 170	400 ą 70	350 ą 60	530 ą 80
copper	b	-	96,000	110,000 ą 8,000
zinc	b	-	74,000	83,000 ą 5,400
arsenic	2,900 ą 200	10,000 ą 1,400	3,500 ą 790	19,000 ą 900
selenium	3,200 ą 320	7,300 ą 420	1,800 ą 160	4,300 ą 360
silver	c	-	8,600 ą 1,800	3,900 ą 330
cadmium	b	-	13,000	14,000 ą 1,000
mercury	300 ą 54	220 ą 37	130 ą 3	110 ą 15
lead	1,500 ą 340	1,400 ą 290	64 ą 8	69 ą 11
strontium	b	-	15,000	16,000 ą 1,900

	1566a
Analytes	Analyzed value	Certified value

aluminum	64,000 ą 1,300	200,000 ą 12,000
iron	1,100,000 ą 40,000	540,000 ą 15,000
chromium	730 ą 50	1,400 ą 460
copper	57,000 ą 500	66,000 ą 4,300
zinc	680,000 ą 2,000	830,000 ą 57,000
arsenic	3,800 ą 280	14,000 ą 1,200
selenium	950 ą 130	2,100 ą 500
silver	3,500 ą 630	1,700 ą 150
cadmium	3,600 ą 20	4,100 ą 380
mercury	110 ą 150	64 ą 7
lead	370 ą 10
strontium	9,600 ą 40	11,000 ą 1,000

^a CRMs analyzed included DOLT-1 (Dogfish liver), LUTS-1 (Nondefatted lobster hepatopancreas, and 1566a (oyster tissue). The data for manganese and nickel were not available and there are no CRM certified values for barium and tin.
^b The element was not analyzed for this CRM.
^c The CRM was not certified for this element.