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Analytical Method: Analytical Quality Assurance, Standard for Calcium

Reagents:

Cat.No. 102121  Calcium nitrate tetrahydrate for analysis

Cat.No. 116754  Water for analysis

 

Preparation of a standard solution:

Dissolve 2.946 g of Calcium nitrate tetrahydrate in a calibrated or conformity-checked 500-ml volumetric flask and make up to the mark with distilled water. The stock solution prepared according to this procedure has a concentration of 1000 mg/l calcium.

 

Further investigational concentrations may be prepared from this stock solution by diluting accordingly.

 

Stability:

The stock solution of 1000 mg/l remains stable for one week. The diluted investigational solutions remain stable for one day.

 

For use with test kits:

Measuring range
in mg/l Ca

110083

MQuantTM Calcium Test

10 - 100

111110

MColortestTM Calcium Cell Test

2 - 200

116993

Reflectoquant® Calcium Test

2.5 - 45.0

116125

Reflectoquant® Calcium Test

5 - 125

100858

Spectroquant® Calcium Cell Test

10 - 250

100049

Spectroquant® Calcium Test

0.20 - 4.00

114815

Spectroquant® Calcium Test

5 - 160

 

Materials

     
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