Answer Posted / david. r

Solutions of
potassium dichromate in perchloric acid and holmium oxide
in perchloric acid can be used.
However, these acidic solutions are difficult to work with
as the flow cell has to be thoroughly
cleaned after the measurement to remove any traces of
fluorescence from the potassium
dichromate solution. Aqueous caffeine solution, which is
easy to prepare and handle, with lmax at
272 nm and 205 nm, and lmin at 244 nm, can also be used.

What is related substance by HPLC impurity limits as per USP?

1153

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why holium oxide prepared in 10% HCLO4 SOLUTION

1497

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How to determine water content of bis tetrazole amine mono ammonium salt

3529

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Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

2652

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If we do accuracy at same concentration at which linearity planned,what is the need to do linearity separately?

2347

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what is the difference between potentiometric titration and karl fischer titration?

3257

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mode of absorption in alimentary canal?

2434

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if content uniformity passing but dissolution varrying then what is next step?

936

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if rsd failed then what require to do?

879

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for inorganic molecules require to do RS, Assay and disso?

774

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if identification threshold crosses the limits then what next step?

915

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Ratio of Water and Acetonitrile(diluent) is not recommended to use in cleaning method validation,why?

3024

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For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

4134

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why we are using benzene, anyline in acetic anhdride assay titration method?

2169

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What is stray light in uv what are units for stray light

1720

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