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how to prepare working standard in our laboratory aganist
reference standard ?
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Answer / akhtar khan
working standardrs are prepared against reference standard
by triplicate analysis and calculated with the potency of
reference standard then mean of the same taken as the final
results
| Is This Answer Correct ? | 47 Yes | 8 No |
Answer / psreddy
1.Select the raw material from the latest consignments and
identify which consignment is closest to 100% purity
2.Following tests compared with reference standard.
a.Description
b.Identification
c.Loss on drying/water content
d.Assay (Thrice)
3.Acceptance criteria :
i.The % RSD of the values obtained by both
chemists is NMT 2.0%.
ii.The % RSD of the values obtained by
individual chemist is NMT
| Is This Answer Correct ? | 17 Yes | 0 No |
Answer / sidhu s
1. For the selection of material consider the assay, impurities and expiry date. Least impurities and highest assay and expiry is suitable. 2. To be perform identification, Loss on drying, RS and Assay. 3. Perform the assay in triplicate and RSD should not be more than 1.0 percentage.
| Is This Answer Correct ? | 1 Yes | 2 No |
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Organic Chemistry 
