What is the difference between the working standard and reference standard?

1 Answers  

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what is primary solution and secondary solution

2 Answers  

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what is the defferance between the potency and working standard

1 Answers   Arbro Pharmaceuticals, Caplin Point, ECOlogics, Matrix, Orchid, Venus Remedies,

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Why sometime potassium ortho phosphate mix with acetone use for sample preparation for hplc

0 Answers  

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What is chiral and why this performing in HPLC

4 Answers   Hetero, Macleods,

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from compund pka value how to select buffer and column?

2 Answers   Emcure, Zydus Cadila,

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which pharmacopeoia mentions that caffiene is used as a standard for HPLC calibration? which other standardscan be used for the same?

1 Answers   Hetero, Mylan,

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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 the definition of limit of stray light in UV calibration

1 Answers   FDC, Zydus Cadila,

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some compound havving uv region but not give much more response during hplc analysis

2 Answers  

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What is the acceptance criteria for moisture balance when calibrated with sodium sulfate

0 Answers  

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Whatn is HPLC

1 Answers   HPLC, Jubilant, Orchid,

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