Answer Posted / sukhraj kaur

GC is a chromatography separation method in which mixture of component is seperated into indiviual component by using Solid or immbolized stationary phase and gasious mobile phase

What is related substance by HPLC impurity limits as per USP?

1106

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How to set analyticl specification for combination products?

744

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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?

1973

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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?

3540

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From where require to take the RLD sample?

754

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how to calibrate hplc & gc

4508

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For limit test of heavy metals in BP, Method C require that the substance is ignited at a temperature not exceeding 800 °C. Why confines such the temperature?

4073

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please explain about aluminium hydroxide assay

1132

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Which are the diffrent grades of api in pharma?

767

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if your impurity coeluting with each other in that situation how require to set specification? is it acceptable?

977

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What is the diference between residual solvents and organic volatile matter

2052

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how many types of balance calibration test?

2300

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what parameters we will consider while developing a HPLC method and how we confirm our HPLC method is valid?

3689

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2319

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what is the origin to prepare standard operating procedure

2326

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