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Chemical Inputs

Technical articles on chemical inputs

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Analytical Grade Sulfuric Acid in the Kjeldahl Method: Laboratory Sample Digestion

Analytical Grade Sulfuric Acid in the Kjeldahl Method: Laboratory Sample Digestion

Author: Walmir Rezende • 08/05/2026

The role of analytical grade sulfuric acid in Kjeldahl digestion and why analytical purity prevents errors in total nitrogen results.

Pharmaceutical Grade vs Industrial Grade Sulfuric Acid: Differences in Purity and Application

Pharmaceutical Grade vs Industrial Grade Sulfuric Acid: Differences in Purity and Application

Walmir Rezende • 08/05/2026

Differences between analytical grade (P.A.) and 98% industrial grade sulfuric acid: purity, impurity control and when each one is the right choice.