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pH Measurement of Small Biological Samples

Steven Lemore service at lazarlab.com
Tue Nov 26 22:09:16 EST 1996

The need frequently arrises in biological laboratories to measure pH in
small sample vessels such as 96 well plates, microcentrifuge tubes, or
NMR tubes.  Standard pH electrodes are too large to fit into these small
containers. Miniature glass electrodes are both breakable and have a high
electrical resistance which makes the pH measurements unstable. A micro
combination pH electrode has been developed which has a 1 mm tip and a 2
mm diameter flexible Teflon body which can measure pH in less less than
20 microliters of sample. This probe has a solid state sensor which gives
drift free pH measurements. The probe can be used with a standard pH
meter. Further information can be obtained via email at
service at lazarlab.com

Hafiz Maherali
Department of Plant Biology
University of Illinois
265 Morrill Hall, 505 South Goodwin Ave.
Urbana, IL 61801-3707
tel: 217-244-3167
fax: 217-244-7246
email: h-maher at uiuc.edu

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