Serum zinc concentrations

contamination from laboratory equipment.

J. O. Ralstin, Philip J Schneider, L. Blackstone, R. L. Ruberg

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The following experiment was designed because of high serum zinc reported in patients who were reciving total parenteral nutrition (TPN) concentrations. Blood samples were collected, divided into 3 containers: a clean glass control test tube, a vacuum collecting tube with a rubber stopper, and paraffin clot activator. It was found that compared to glass control tubes, vacuum collection with rubber stoppers contributed an average of 76 +/- 14 microgram/dl of zinc as contaminants. Moreover, tubes with a rubber stopper and clot activator contributed 198 +/- 42 microgram/dl of zinc as contaminants. It is concluded that care must be used to avoid trace element contaminants when plasma zinc concentrations are analyzed. Without proper methodology, including selection of the container in which the sample is taken, erroneous results will be reported.

Original languageEnglish (US)
Pages (from-to)179-181
Number of pages3
JournalJournal of Parenteral and Enteral Nutrition
Volume3
Issue number3
StatePublished - May 1979
Externally publishedYes

Fingerprint

Equipment Contamination
laboratory equipment
stoppers
blood serum
Zinc
Rubber
rubber
zinc
Vacuum
Serum
Glass
containers
glass
Total Parenteral Nutrition
total parenteral nutrition
Trace Elements
Paraffin
alkanes
trace elements
sampling

ASJC Scopus subject areas

  • Food Science
  • Medicine (miscellaneous)

Cite this

Serum zinc concentrations : contamination from laboratory equipment. / Ralstin, J. O.; Schneider, Philip J; Blackstone, L.; Ruberg, R. L.

In: Journal of Parenteral and Enteral Nutrition, Vol. 3, No. 3, 05.1979, p. 179-181.

Research output: Contribution to journalArticle

Ralstin, J. O. ; Schneider, Philip J ; Blackstone, L. ; Ruberg, R. L. / Serum zinc concentrations : contamination from laboratory equipment. In: Journal of Parenteral and Enteral Nutrition. 1979 ; Vol. 3, No. 3. pp. 179-181.
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