Calcium standard solution (400 ppm Ca):
Dissolve 1 gm of calcium carbonate in 23 ml of 1M hydrochloric acid and add sufficient distilled water to produce 100 ml. Dilute 1 volume of this solution to 10 volumes with distilled water immediately before use.
Calcium standard solution (100 ppm Ca)
Dissolve 0.624 gm of dried calcium carbonate in distilled water containing 3 ml of 5 M acetic acid and add sufficient distilled water to produce 250 ml. Immediately before use dilute 1 volume of this solution to 10 volumes with distilled water.
Dissolve 0.624 gm of dried calcium carbonate in distilled water containing 3 ml of 5 M acetic acid and add sufficient distilled water to produce 250 ml. Immediately before use dilute 1 volume of this solution to 10 volumes with distilled water.
Calcium standard solution (10 ppm Ca)
Dissolve 0.624 gm of dried calcium carbonate in distilled water containing 3 ml of 5 M acetic acid and add sufficient distilled water to produce 250 ml. Dilute 1 volume of this solution 100 volumes with distilled water immediately before use.
Dissolve 0.624 gm of dried calcium carbonate in distilled water containing 3 ml of 5 M acetic acid and add sufficient distilled water to produce 250 ml. Dilute 1 volume of this solution 100 volumes with distilled water immediately before use.
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