what is the concept for adjustment of pH in HPLC buffer solution ? a. Common ion effect b. Counter ion effect and explain me, how we adapt this principles & what is the role of these principles in our method

1 Answers   Apex, Pentagon Labs,

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what is the differance between Analytical and semi micro balance?

2 Answers  

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in hplc calibration we are using 0.05% acetone why we are using that one and what happen when its conc increases or decreases

4 Answers   Aurobindo, Cadila, Martin,

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What the difference in loss on drying and residue on ignition

2 Answers  

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if relative response factor is 1.07, to select how much value

1 Answers   Natco,

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What is the exact reason to use THF and IPA in buffers of Reverse phase HPLC as a solvent?

1 Answers   Dr Reddys,

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why we have to store the pH electrode in 4.01 buffer ?

1 Answers   Aurobindo, BioMax, BioSynth, Cipla, Indoco Remedies, SGS,

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In UV calibration we use Holmium perchlorate solution made in 1.4M perchloric acid The question is that 1.4 M perchloric acid we make is it in water or glacial acetic acid?

4 Answers  

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While performing TOC sst analysis Zero shift disabled & sample analysis zero shift enabled why?

0 Answers  

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inhouse product is in capsule form in combination and RLD is in tablet form then can we proceed for multimedia CDP? in inhouse capsule product disso is paddle with sinker in release media is there then RLD product in tablet form then with same as paddle with sinker we can proceed n.a.?

0 Answers  

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how can we calculate void volume?give its importance in brief

1 Answers   Natco,

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A ha tc is actual defination of retention time?

0 Answers  

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