Is the copper sulfate used in the Lachat Kjeldahl digestions anhydrous?

Document ID

Document ID TE7378

Version

Version 3.0

Status

Status Published

Published Date

Published Date 04/26/2018
Question
Is the copper sulfate used in the Lachat Kjeldahl digestions anhydrous?
Summary
Copper sulfate in Lachat Kjeldahl digestions
Answer
The copper sulfate used in the Lachat Kjeldahl digestions is anhydrous. Hydrated copper sulfate can also be used, but the weight added to prepare the digestion solution should be adjusted to account for the molecular weight of hydrated copper sulfate.

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