Potassium Reagent Kit (Turbidimetric)

Sodium tetraphenylboron reagent for quantitative potassium in serum.

Method: Sodium tetraphenylboron (turbidimetric)
Sample: Serum free of haemolysis, separated from the clot as soon as possible
Linear up to 7 mEq/L
Liquid stable, ready to use pack
Reads at 630 nm

For in vitro diagnostic use by laboratory and healthcare professionals only. Please refer to the instructions for use supplied with each product for complete protocol and performance details.

Overview

For in vitro quantitative determination of potassium concentration in serum. Principle: Potassium reacts with sodium tetraphenylboron in a specially prepared buffer to form a colloidal suspension; the turbidity is directly proportional to serum potassium. Separate serum from the clot promptly, as potassium leaches from red cells. If potassium exceeds 7 mEq/L, dilute the sample, re-assay and multiply by the dilution factor.

Intended use: For in vitro quantitative determination of potassium concentration in serum.

Specifications

Specifications for Potassium Reagent Kit (Turbidimetric)
Shelf life	12 months
Storage	2–8 °C, protected from light
Method	Sodium tetraphenylboron (turbidimetric)
Sample type	Serum free of haemolysis, separated from the clot as soon as possible
Wavelength	630 nm
Reaction type	End point
Reagent volume	1 mL
Sample volume	10 µL
Incubation	5 minutes
Reaction temperature	37 °C
Light path	1 cm
Standard	5 mEq/L
Linearity	7 mEq/L
Reagent composition	Reagent 1: potassium reagent; potassium standard 5 mEq/L
Reference interval	3.6–5.5 mEq/L Reference intervals are indicative; each laboratory should establish its own (see the kit insert).