wtite the procedure for preparation of test solution of calcium gluconate for test of sulphate impurities
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Explanation:
Test preparation: Dissolve 1.0 g in a mixture of 10 mL of hydrochloric acid and 20 mL of water, and dilute with water to 55 mL.
Analysis: Proceed as directed in the chapter, except to omit the addition of 20 mL of 7 N sulfuric acid.
Acceptance criteria: NMT 3 ppm.
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