potassium biphthalate

potassium biphthalate

[pə′tas·ē·əm bī′tha‚lāt]
(organic chemistry)
HOOCC6H4COOK A crystalline compound, soluble in 12 parts of water; used as a buffer in pH determinations and as a primary standard for preparation of volumetric alkali solutions. Also known as acid potassium phthalate; potassium acid phthalate; potassium hydrogen phthalate.
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The first ESR analysis consisted of a carboxy-PTIO solution diluted with PBS pH 7.4.The second solution was composed of diethylamine NONOate (DEA NONOate), a nitric oxide generator, added to a carboxy-PTIO diluted with potassium biphthalate buffer pH 4.0.A third solution containing streptozotocin in PBS, carboxy-PTIO, and potassium biphthalate buffer was examined also.A fourth ESR analysis consisted of a solution mixture containing streptozotocin in PBS, carboxy-PTIO, [Cu.sup.++], and ascorbate in potassium mixture biphthalate buffer.