Shelf-stable milk calibration standards

Details Shelf-stable milk calibration standards Shelf-stable milk calibration standards

1992-12-09

1994-02-22

Housel, James C.

Chemistry: analytical and immunological testing

Composition for standardization, calibration, simulation,...

436 10, 436 19, 2524081, G01N 3100, G01N 3122, G01N 3304

Patent

active

052886425

ABSTRACT:
A calibration standard for calibrating machines which count the somatic cells in a milk sample, comprises an aqueous dispersion of microbeads bearing a fluorescent dye, a suspending agent, and an electrolyte; the dye has an excitation wavelength below 580 nm and a fluorescence emission wavelength in the range of 550 to 660 nm, with the excitation wavelength being at least 10 nm below the emission wavelength; the microbeads are present in a predetermined number per unit volume of dispersion; typically the standard contains 1.times.10.sup.5 to 9.times.10.sup.5 beads/ml.

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The Merck Index, Tenth Edition, 1983, p. 260.

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