Low formaldehyde producing blood diluent

Abstract

A low formaldehyde containing aqueous blood diluent contains an effective amount of ethylenediamine tetraacetic acid, ethylenediamine tetraacetic acid derivative, or combinations thereof; an effective amount of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one; and an effective amount of 5-bromo-5-nitro-1,3-dioxane. Advantageously, less than about 1 parts per million of formaldehyde is produced in this multipurpose diluent. A method of analyzing a blood sample containing blood cells is conducted by forming a diluted blood sample by mixing a blood sample containing blood cells with this diluent and analyzing the diluted blood sample to determine a physical parameter of the blood cells.

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