There are a number of ASTM spec's that call for the use of distilled water in the make up of reagents etc. I understand the desire to use "pure" water in these reagents. Can deionized water be substituted for distilled water in these formulations when a specific ASTM water quality has not been specified?
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Deionized vs. Distilled Water
- Thread starter yank38
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As I understand it, the answer is no as deionized water will still have some residual ions. Having said that there are certain reagents that do not need distilled water in the makeup. This depends on there in use. The reason for the distilled water is that most of today's analytical procedures are for more sensitive than the days of wet chemistry.
Our QC and Analytical lab each had it's own quartz still for the distilled water.
Our QC and Analytical lab each had it's own quartz still for the distilled water.
EdStainless
Materials
You can make pure water many ways. You need to know what impurities you water has and how they effect your process. Distilled water can have low BP carryover and dissolved gasses. DI and RO each have their own short comings so you need be aware.
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