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TABLE 6-1 (Continued) <br /> Sample <br /> detection Percent <br /> Sample matrix Preparation method Analytical method limit recovery Reference <br /> Liver, kidney, Bomb digest sample with acid GFAAS 20 pg/g 85-107 Ellen and Van <br /> muscle and heat or digest with acid (bomb); (bomb); Loon 1990 <br /> and dry ash; dissolve in acid; 5 µg/g 75-107 <br /> dilute with water (dry ashing) (dry ashing) <br /> DPASV NR 82-120 <br /> rn <br /> Tissues (brain, Sample dry ashed; dissolved AAS NR NR Exon et al. <br /> heart, lung, in HNO3 1979 <br /> kidney, liver, <br /> and testes) <br /> Tissues Freeze dry samples; subject to NAA NR NR Hewitt 1988 = <br /> thermal neutron irradiation; o <br /> chemically separate elements U) <br /> Brain Sample wet ashed with mixture ASV NR NR Jason and <br /> of acids, mixed with Metez Kellogg 1981 <br /> and analyzed <br /> Bone Partially polarized photon K-XRF 20 µg/g NR Christoffersson <br /> directed at second phalanx et al. 1986 <br /> of left forefinger (non- <br /> invasive technique) <br /> Bone Partially polarized photon L-XRF 20 µg/g NR Wiclopolski et <br /> directed at anteromedial al. 1986 <br /> skin surface of mid-tibia <br /> (non-invasive technique) <br />