Answer Posted / latif ahmed [ozone pharma,guw

1.caffeine is available in anhydrous form.
2.Shows maxima at two different wavelength ie.205nm & 273nm
3.Cheap & easily available.

what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

3630

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what is procedure of actual procedure for registration of drug?

1954

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Which products will produce when acetic anhydride reacts with Ter-butanol, Sec-butanol, Iso butanol, Dimethylamine etc.

2829

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USP methodology, EP methodology, IP methodology, among three if possible to use one methodology for qualify working standard to use USP, EP, IP ? Please explain...

1968

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which are the sizes of capsules?

887

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I have compare C2H2-air and C2H2-N2O flame AAS on determination calcium. Both use same range of std to plot calibration curve. (2-6ppm) When i measure the sample with phosphate, KCl and LaCl, C2H2-N2O flame give false positive result, around 0.5ppm. When i measure the sample with phosphste, KCl and EDTA. C2H2-N2O flame also give 0.5ppm false positive. But both above mentioned sample would not give false positive when measured by C2H2-air flame. What is the reason?

3487

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If combination product how require to identify which imp is of which api?

789

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Which are the diffrent grades of api in pharma?

692

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What is the main difference between ODS1 and ODS2 Hplc column.

5122

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how you start the solubility study?

766

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what is the acceptance criteria for enteric coated tablets in 0.1n hcl validation in each parameter?

833

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How to set specification of assay, fisdolution and related substances?

823

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What is the calibration of uv process and preparation

1937

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what is the importance of peak purity in HPLC and how we can calculate through manul(not software)?

4419

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on saturation solubility study data how we can find out the bcs class of drug?

826

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