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TABLE 6-1 (Continued) <br /> Sample <br /> detection Percent <br /> Sample matrix Preparation method Analytical method limit recovery Reference <br /> Urine Dilute sample; react with Spectrophotometry NR NR Tomokuni and <br /> (b-aminolevulinic ethylacetoacetate and ethyl- Ichiba 1988 <br /> acid) acetate to form 6-amino- <br /> levulinic acid-pyrrole; react <br /> with Erhlich's reagent <br /> Urine Acidify sample; separate b- HPLC/FL 10 µg/L NR Tabuchi et <br /> (b-aminolevulinic aminolevulinic acid on HPLC; al. 1989 <br /> acid) react with formaldehyde and <br /> acetylacetone o 0 <br /> D � <br /> Serum and 206Pb added and sample acid IDMS NR 80-120 Manton and Cook <br /> cerebrospinal digested; lead separated by 1984 = <br /> fluid ion-exchange,eluted, and <br /> v <br /> deposited onto platinum wire <br /> Feces Dry and pulverize sample; ICP-AES 10-50 µg/L >86 Que Hee and <br /> digest with hot acid in Boyle 1988 <br /> Paar bomb <br /> Testes, liver, Dice sample and digest in ICP-AES 10-50 µg/L >80 Que Hee and <br /> spleen, kidney hot acid in a Paar bomb; Boyle 1988 <br /> evaporate; redissolve in <br /> HCIIHNO3 <br /> Spleen, liver, Sample wet digested with HNO3- GFAAS NR NR Blakley and Archer <br /> and kidney HC104 mixture 1982; Blakley <br /> et al. 1982 <br /> TABLE 6-1 (Continued) <br />