Are there standards to verify the accuracy of a hardness method?

Document ID

Document ID TE288

Version

Version 4.0

Status

Status Published

Published Date

Published Date 08/07/2018
Question
Are there standards to verify the accuracy of a hardness method?
Summary
Verifying the accuracy of a hardness method
Answer
Hach procedures will detail the use of a primary standard solution in the Accuracy Check Section.

-APA6000 Hardness Standard Solution (Product # 2058016)
-Calsium Chloride 2 mg/L 946 mL (Product # 2058116)
-Calcium Hardness Standard Solution, 10,000 mg/L as CaCO3 (NIST), 16/pk-10-mL Ampules (Product # 218710)
-Hardness Quality Control Standard, Low Range, 500 mL (Product # 2833449)
-Hardness Quality Control Standard, High Range, 500 mL (Product # 2833349)
-Magnesium Standard Solution, 1,000 mg/L as Mg (NIST), 100 mL (Product # 1479442)

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