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Metabolism of nickel-63 carbonyl

Journal Article · · Toxicol. Appl. Pharmacol.; (United States)
Sprague-Dawley male rats (150 to 200 g) were admin. /sup 63/Ni-labeled nickel carbonyl (Ni(CO)/sub 4/, a catalyst in the petroleum, rubber and plastic industries) either iv (2.2 mg Ni/100 g) or by inhalation (0.20 mg NI /liter air x 15 min). During the first 12 hr after iv injection, an average of 23.2% of the dose was excreted in the urine as /sup 63/Ni; average excretion fell to 3.7% during the second 12 hr and the average total urinary excretion during 4 days after injection was 31.2%. The average total fecal excretion was 2.4%; average biliary excretion during the first 6 hr after injection was 0.2%. The lung was the major excretory organ for /sup 63/Ni: 38.4% of the dose was exhaled in the first 6 hr after injection, but no /sup 63/Ni was exhaled thereafter. The average body burden of /sup 63/Ni at 24 hr was 17.7% of the dose; most was located in muscle and fat, bone and connective tissue, viscera and blood, with 1.1% in the brain and spinal cord. At 1 hr, 51.9% of the blood /sup 63/Ni was present in plasma; at 6 hr, 91.6% was in the plasma and 80.5% of this was bound to the serum proteins. At 6 hr after injection, an average of 1.63% was found in the lung and 0.69% in the liver; at 24 hr the average content fell to 0.76% and 0.33%, respectively. The tissue distribution of /sup 63/Ni in rats sacrificed 24 hr after inhalation differed from that after iv injection, the proportion of /sup 63/Ni in the viscera was greatly increased and the musculoskeletal system and fat levels were proportionately decreased; brain and spinal cord levels were also significantly higher.
Research Organization:
Florida College, Univ. of Medicine, Gainesville
OSTI ID:
5575491
Journal Information:
Toxicol. Appl. Pharmacol.; (United States), Journal Name: Toxicol. Appl. Pharmacol.; (United States) Vol. 12:2; ISSN TXAPA
Country of Publication:
United States
Language:
English

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