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centrnuge;analyze UlgaIIIL " µbb <br /> layer (fish) , <br /> TABLE 6-2 (Continued) <br /> Sample <br /> detection Percent <br /> Sample matrix Preparation method Analytical method limit recovery Reference <br /> 0.1 n NR Chau et al. 1980 <br /> Sediment, fish, Purge sample; cryogenically trap GC/AAS (solid) <br /> vegetation (TAL) on solid sorbent GC column <br /> 50 ng/g NR Chau et al. 1980 <br /> Sediment, fish, Digest sample with acid; heat; AAS (sediment) <br /> vegetation (total dilute with water 10 ng/g (fish NR <br /> rn <br /> lead) and vegetation) <br /> D <br /> NR NR Michaelson and <br /> Milk 50 µL (C.zHs)4NOH in ethanol GFAAS Sauerhoff 1974 <br /> added to 25 µL mild, heated, <br /> and diluted with water to 125 µL <br /> 0.005 µg/9 99 Capar and Rigsby = <br /> Evaporated milk Dry ash sample; dissolve in ASV 1989 0 <br /> HNO3 <br /> Mussel, tomato Wet ash sample with acid or acid GFAAS 4 ng/g 94-95 Aroza et al. 1989 <br /> plus catalyst; generate lead <br /> hydride <br /> 85-106 Satzger et al. <br /> Agricultural Sample dry ashed with H2SO4 DPASV 0'4 °fig 1982 <br /> crops and HNO3; diluted with water <br /> 85-107 Ellen and Van Loon <br /> Grains, milk Bomb digest sample with acid GFAAS 2(bomb); 1990 <br /> mussel, fish and heat or digest with acid 5 µg/9 75-107 <br /> and dry ash; dissolve in acid; (dry ash) <br /> dilute with water DPASV NR 82-120 <br />