A simple electronic capillary microviscometer

✍ Scribed by Francisco J. Müller; Julio C. Pita

• Book ID: 102627523
• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 480 KB
• Volume: 135
• Category: Article
• ISSN: 0003-2697
• DOI: 10.1016/0003-2697(83)90737-6

✦ Synopsis

Inexpensive electronic components were adapted to a miniaturized version of a falling-ball viscometer. This allowed automatic determination of relative viscosities of Newtonian fluids with 1% accuracy and employing only 10 to 30 pl of sample or about 1 ~g of some biological materials. The electronic microviscometer was tested with bidistilled water at several temperatures, with @SO, and glycerol solutions, several organic liquids, and some preparations of high-molecularweight hyaluronic acid. Details of construction, circuitry, temperature control, operating procedure, and calculations are given as well as an evaluation of the instrument's performance in terms of previously established criteria.