Answer Posted / surekha

caffiene is available in pure state and it is a primary
standard .

Please tell me about the pH of Polycaboxylic ether is it in the 5-6 range ever or more than 6

2550

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What is viod volume and peak purity in HPLC?

2811

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why digestion require in icpms?

726

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is it necessary to do HPLC calibration at wavelength 315nm if we are doing analysis at this wavelangth

2104

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How to determine water content of bis tetrazole amine mono ammonium salt

3423

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what is %labelled amount in content uniformity of dosage unit and its calculation?

5137

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Loss of linearity in tkn analysis, possible reasons?

1255

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when we talk about change in entropy we consider total entropy means of surround +entropy of system but when we talk about change in Gibss free energy we consider entropy of system.explain with reason.

1984

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What is similarity factor and its use in api strength?

1248

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Why a1% value is used for some product ? What is the criteria for selection a1% value ?

2289

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in stress study if your api not soluble in hcl naoh h2o2 then what require to do?

791

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why glutent are detected in the rice cereal baby food product even manufacturer claimed that they are using rice and milk only?we have using ELISA to do the test,and rice supposed not containing any glutent,rite?We already repeat the test so many times and it still detected.just wondering where the glutent came from?

2706

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How to establish relative response factor for hplc. Why it is required?

1150

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if tech transfer fails whay require to do?

771

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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?

1909

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