How NMR spectra can be calibrated in presence or absence of TMS?

1 Answers  

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how to selecet an exact coloumn for an new molecule development by hplc how to select exact salt as buffer for new molecule development by hplc what is the the process to select the mode of saparation of compoundes by hplc what is the use of ph of buffer what is use of buffer,ph,organic phase,ans methods how the molecules get saparated in coloumn,

0 Answers  

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if you get peak in blank then what require to do?

0 Answers  

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Optical Rotation*0.9477*100*200] Assay Of dextrose= ________________________________ 99.8* 200 why Factor=0.9477

1 Answers   Claris Lifesciences, Inven Pharmaceuticals, Levo,

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Why dissolution test performed on six jar?

1 Answers   Mylan,

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Dear Sir, This is Thirunavukkarasu am working in Ordain Health Care AR&D, Am Having one problem While doing method development my question Metadoxine and Pyridoxine same chemical nature and structural activity i tried lot of methods but Analyte eluted same Retantion time i cant separate both peaks. solubility, pH both are same only only difference melting point metadoxine 210 C Pyridoxine 102 C please do the help needful for me

5 Answers   Ordain Solutions,

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When performing Moisture content how to you say only Methanol react with water not product Explain?

2 Answers   Orchid,

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What should be the precision for HPLC during technology transfer?

3 Answers  

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what is the difference between c-8 and c-18 column

7 Answers  

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what is mean by theoritical plates(not formula) ?

4 Answers   Micro Labs,

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Why using Holmium oxide in UV calibration

8 Answers   Dr Reddys, Matrix, Nakoda Chemicals, Orchid,

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why hexane is used for FID calibration in GC

1 Answers   Glochem,

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