Potassium Assay

For in vitro quantitative determination of potassium in human serum.

Regulatery Status: FDA 510(k), CE

Product Catalog Number Packaging Method/Format
Product Catalog No: Kit (720 Tests) Pack Size: DZ113C-K Pack Size: R1: 4 x 40 mL
R2: 4 x 10 mL
Cal: 2 x 3 mL vial
(Calibrator Included)
Pack Size: Enzymatic/Kinetic,
Liquid Stable
Product Catalog No: Kit (360 Tests) Pack Size: DZ113C-K01 Pack Size: R1: 2 x 40 mL
R2: 2 x 10 mL
Cal: 2 x 3 mL vial
(Calibrator Included)
Product Catalog No: Calibrator Pack Size: DZ113C-CAL Pack Size: Cal: 2 x 3 mL vial
Pack Size:
Product Catalog No: Control Pack Size: DZ113C-CON Pack Size: Con: 2 x 3 mL vial
Pack Size:

Category:
Product Features

Potassium Assay has an outstanding linearity range from 2.0 mmol/L – 8.0 mmol/L. Potassium Assay offers excellent precision CV% of <2%. A comparison study showed that the assay has good correlation with existing ISE method’s with a correlation coefficient value of 0.98, slope of 1.07 and y intercept of -0.30. The assay shows virtually no affect by the following interfering substances at indicated concentrations: Na+ 150mM, NH4+ 0.5 mM, Ca2+ 7.5 mM, Pi 2.0 mM, ascorbic acid 10.0 mM, Zn2+ 0.5 mM, Fe3+ 0.5 mM, Cu2+ 0.5 mM, triglycerides 1000 mg/dL, hemoglobin 500 mg/dL, conjugated bilirubin 20 mg/ dL and unconjugated bilirubin 15 mg/dL.

Assay Principle

Potassium is determined spectrophotometrically through a kinetic coupling assay system using potassium dependent pyruvate kinase. Pyruvate generated is converted to lactate accompanying conversion of NADH analog to NAD analog. The corresponding decrease of optical density at 380 nm is proportional to the potassium concentration in the serum.

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