Abstract
Zinc and copper have been estimated in CSF of 14 normal volunteers, nine men and five women. Zinc was analyzed by limited-aspiration flame atomic absorption spectrophotometry using a deuterium continuum light source. Copper was analyzed in 0.1% HNO3 by flameless atomic absorption spectrophotometry with a graphite cuvette on a flameless atomizer. Recovery of added zinc varied less than 5% and that of the added copper varied less than 8%. CSF zinc was 31.5±19.8 μg/L (mean ± 1 SD); CSF copper, 7.5±3.1 μ/L. Values obtained for CSF zinc are about 1/2 those we and others obtained previously, the decrease related almost exclusively to removal of interference by the CSF matrix, which produced spuriously elevated values without use of the deuterium light source. Values obtained for CSF copper were approximately one-tenth those we and others had obtained previously. The decrease related, in part, to the removal of matrix effects, but also to improvement of the signal-to-noise ratio present in other techniques.
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Agarwal, R.P., Henkin, R.I. Zinc and copper in human cerebrospinal fluid. Biol Trace Elem Res 4, 117–124 (1982). https://doi.org/10.1007/BF02783252
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DOI: https://doi.org/10.1007/BF02783252