Answer Posted / ikhlakh

we can select hplc column mainly on the basis of analyte
nature i.e for acidic molecule acidic column,for basic
molecule basiccolumn.

we can use expired sample for validation and analyst qualification?

786

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How can I develope method of dissolution by HPLC OR UV

2391

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What is the difference between chromatographic purity and related substances?

1345

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Why we used in n-butyl acetate water content terminology while in ethyl acetate we used moisture content terminology?

1840

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how to decide for one product require water content or LOD?

764

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mahagenco syllabus for the post of chemist

6452

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In HPLC calibration, caffeine is used as primary standard for wave length calibration due to caffeine is having dual maxima at 273 & 205 nm and one minima at 245 nm. Any body can give reference of these details from any pharmacopeia (with chapter no.) or any other authentic guideline?

1958

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what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

2656

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Why a1% value is used for some product ? What is the criteria for selection a1% value ?

2326

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Why potassium dichromate is used in calibration of uv?

1971

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in which situation require to use paddle and basket?

723

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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?

3525

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how will you do the prep for unstable componds?

2004

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What is importance of pH in the Heavy metal test and How it effect on the test results?

2272

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How to compare XRD graphs against standard and carry polymorpism study of API's by powder XRD method?

3851

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