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Question/Answer

Is the Color Standard made with Potassium Chloroplatinate and Cobaltous Chloride Hexahydrate? What is the shelf life of this standard?

This standard is made to the specifications in Standard Methods 2120B. It does contain potassium chloroplatinate and cobaltous chloride hexahydrate. The shelf life is 24 months.

Is the pH in Color Standard LC 133007 within pH 4 to 7 range?

No, the color standard is not in the range of 4-7 pH. The standard is made with 100 mL concentrated HCl per L of solution. The standard is not required to be measured at the pH range required of samples.

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