what are the normalisation, internal standard and external standerd methods in HPLC.

2 Answers   GVK,

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

0 Answers  

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when we use capillary and packed columns in gc

4 Answers   Rakshit Drugs,

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In Karl Fischer titration,What is the situation if the material tested is only soluble in water,and not soluble in the common solvents used such as methanol ?? [e.g. Iron III Hydroxide polymaltose]

1 Answers  

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why water factor is near about 5.0 in kf titration?

3 Answers   Claris Lifesciences, Indchemie Health Specialities,

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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?

0 Answers  

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what is range of Vivible UV ? What is UV& Vivible spctroscopy use for ?

6 Answers  

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what is the difference between LOSS ON DRYING IN ORDINARY OVEN TECHNIQUE AND VACUUM OVEN TECHNIQUE

6 Answers  

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how to develop the shorter run time for pharmacopeial methods having 100 min run time?

3 Answers   Reddy Labs,

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what is role of pH in mobile phase

3 Answers   Cipla, Dhanuka Laboratories,

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what is the d/f b/w normality and molarity and molality..?

1 Answers  

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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?

0 Answers  

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