Question:
Which of the following tests is used for best detecting the presence of excessive silica in crude drugs?
Which of the following tests is used for best detecting the presence of excessive silica in crude drugs?
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Acid-insoluble ash detects sand, silica, and earthy impurities in crude drugs.
Updated On: May 2, 2026
- Ash value
- Acid-insoluble ash value
- Water-soluble ash
- Extractive value
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The Correct Option is B
Solution and Explanation
Concept:
Ash values are used to detect inorganic matter and adulteration in crude drugs.
Step 1: Silica is mainly present as sand and earthy matter.
Step 2: Silica does not dissolve in acid easily.
Step 3: Acid-insoluble ash value measures silica and siliceous matter.
Step 4: Hence, it is the best test for excessive silica. \[ \boxed{\text{Acid-insoluble ash value}} \]
Ash values are used to detect inorganic matter and adulteration in crude drugs.
Step 1: Silica is mainly present as sand and earthy matter.
Step 2: Silica does not dissolve in acid easily.
Step 3: Acid-insoluble ash value measures silica and siliceous matter.
Step 4: Hence, it is the best test for excessive silica. \[ \boxed{\text{Acid-insoluble ash value}} \]
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