Answer Posted / reet

following factors might be the reason:
1. Column ageing
2. how the column was preserved, or what mobile phase was
used before the present experiment
3. sample preparation might be the cause. sample may be non-
homogeneous
4. Slight variation in thepH may also affect the variation
in RT.
5. Other parameters like,temperature can also be one of the
reason.
6. last but an imporatant factor might be some air bubble
trapped in the system.

From where require to take the RLD sample?

741

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for heavy metal test lead used in which form pure form or any other form for preparation of lead standard sol

6045

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How do we get end points and how many end points are possible for citric acid and di-acid not theorotically answer should be given practically.

2567

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AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

2036

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what is mean by nitrosamine impurities?

1051

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

1841

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How to fix the sample conc. in Related substances test by HPLC?

1067

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What is the purpose of octyl silane columns?

4280

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which one is better separation in high pressure liquide chromatogram orlowpressure chromato gram in hplc

2148

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1)What's the meaning of Absorption,give a example. 2)What's the meaning of Adsorption,give a example. 2)what is the difference between Absorption and Adsorption.

2871

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How can we confirm the HPLC column is end-capped or not? Is it possible to identify by physical appearance?

3194

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in which situation require to take incident in validation?

1711

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How require to perform linearity as per ANVISA? What are the acceptance criteria?

1314

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why lactose has less charges when packed in steel containers when compared with packing of lactose in polyamide material?

2285

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which situation gc hs and gc als require to use?

764

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