







| Potassium (Enzymatic) Assay | |||
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| Product Features The assay shows virtually no affect by the following interfering substances at indicated concentrations: Na+ 200 mM, NH4+ 0.5 mM, Ca2+ 5.0 mM, Mg2+ 5.0 mM, ascorbic acid 5.0 mM, and bilirubin 10 mg/dL, 1.5 mM Pi, 0.25 mM CuCl2, and 5 mM glucose. The assay has a linearity range from 2- 8 mM. Within precision %CVs are 3.2% and 3.0% for 4.4 mM and 6.4 mM potassium serum samples, respectively. Total precision %CVs are 5.3% and 3.3% for 4.4 mM and 6.4 mM potassium serum samples, respectively. Comparison study showed that the assay has good correlation with existing ISE method with a correlation coefficient of 0.95. |
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Assay PrinciplePotassium is determined spectrophotometrically through a kinetic coupling assay system using potassium dependent S-Adenosylmethionine Synthase (MAT). NADH is generated after a series of enzymatic reactions. The corresponding increase of optical density at 340nm is proportional to the potassium concentration in the serum. |
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| Intended Use For the quantitative in vitro determination of Potassium in serum samples. |
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| Product | Catalog Number | Packaging | Method/Format |
| Kit (720 Tests) | DZ113C-K | R1: 4 x 40 mL R2: 4 x 10 mL |
Enzymatic
Liquid Stable |
| Calibrator | DZ113C-Cal | 2 x 3 mL | |
| Control | DZ113C-Con | 2 x 3 mL | |
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