New biological reference materials - in vivo incorporated toxic metals in water hyacinth tissues

Conference · Sat Jun 01 00:00:00 EDT 1985 · Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)

OSTI ID:5050578

Austin, J R; Simon, S J; Williams, L R; Beckert, W F

The purpose of this study was to demonstrate that high-quality reference materials, containing high levels of multiple toxic elements, can be produced with in vivo incorporation procedures. The approach taken was to produce water hyacinth tissue materials - leaves and stems containing high levels of arsenic, cadmium, lead, and mercury - as follows: apply a hydroponic feeding procedure for the in vivo incorporation of toxic elements into water hyacinths; dry, blend, and homogenize the plant materials and determine the levels of the incorporated elements and the homogeneity of the generated plant material; demonstrate that low-level control materials can be successfully blended with high-level materials to yield a homogeneous material with intermediate toxicant levels; evaluate the precision of the analytical methods used to determine toxic element levels in the materials; and evaluate the stability of the resulting materials. Sufficient quantities of the parent materials were produced so that characterized reference materials can now be made available on request. Levels of the toxic elements incorporated in water hyacinth leaves were 100, 300, 60, and 27 times the levels present in the control leaves for arsenic, cadmium, lead, and mercury, respectively. Overall precision of sampling, subsampling, and digestion, and chemical analysis of the treated materials, ranged from 3 to 10% relative standard deviation and was generally comparable to that of three NBS biological reference materials tested. 3 references, 1 figure, 4 tables.

• Research Organization: Lockheed Engineering and Management Services Company, Inc., Las Vegas, NV
• OSTI ID: 5050578
• Report Number(s): CONF-830837-
• Journal Information: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States), Vol. 867; Conference: ASTM Committee D-22 on sampling and analysis of atmospheres, Boulder, CO, USA, 8 Aug 1983
• Country of Publication: United States
• Language: English

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LEAD
MERCURY
PLANTS
COMPARATIVE EVALUATIONS
FABRICATION
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