Clinical Chemistry
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Clinical Chemistry 20: 320-323, 1974;
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Clinical Chemistry, Vol 20, 320-323, Copyright © 1974 by the American Association for Clinical Chemistry

Technology of Manually Operated Sampler Pipets

Robert E. Wenk 1 and Jack A. Lustgarten 1

1 Division of Clinical Pathology, Department of Pathology, Sinai Hospital of Baltimore, Inc., Belvedere at Greenspring Ave., Baltimore, Md. 21215.

We have evaluated the performance of manually operated sampler pipets. Twenty-four instruments of various construction, manufacture, and delivery volume were evaluated. Pipet-delivered water and serum were repeatedly weighed under controlled environmental conditions, and precision and accuracy assessed. The pipets often failed to meet the manufacturer's stated tolerance limits. Consumers should calibrate these instruments in their own laboratories. Some of the manufacturer's recommendations for optimal performance are challenged. The manual samplers can substitute for oral pipets and permit safe, inexpensive, simple, and rapid transfer of liquids, if the user recognizes their operational characteristics and limitations in accuracy and precision.

Submitted on June 25, 1973
Accepted on November 21, 1973






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Copyright © 1974 by the American Association for Clinical Chemistry.