Sheath liquid for particle analyzer

摘要

A sheath liquid for use with a particle analyzer has a refractive index of 1.3340 or more at the wavelength of sodium D line at 25 DEG C. A method of using a sheath liquid in which the latter is selected so as to have a refractive index substantially equal to that of the sample containing particles to avoid sporious counts from signals resulting from scattering of light at the boundary between the sheath liquid and the sample fluid. The sheath liquid comprises various compositions including sorfactant and buffer components.