What is the difference between Optical rotation and Spcefic optical rotation

2 Answers   IPCA, Matrix,

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what is difference between UV - VISIBLE MODEL NO like 1600,1601,1700 etc ? plz explain me

0 Answers   Graviti Pharmaceuticals,

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In pharmacopeal solibility parameter of a material, is et essential to test all paramete? If 70-75% parameter passes can we assess that the material is satisfactory or not?

1 Answers   Aurobindo,

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What is viod volume and peak purity in HPLC?

0 Answers  

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Why are using in Hi,zero air, Ni gass are used GC

5 Answers   Aurobindo, ELBS, Vimta Labs,

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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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My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards

0 Answers  

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What is the difference between kf  and LOD

5 Answers   Enaltec Labs,

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What is the reason for negative peak in HPLC while using UV detector.

2 Answers  

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what is the limit of Correlation for IR test compare to the standard and test

3 Answers   Nakoda Chemicals,

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why we are adjusting the ph in buffer solution preparation

2 Answers  

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why 0.005 M sulphuric acid is used to calbrate spectrophotometer and why caffiene is used for calibrating hplc

2 Answers   GVK, Torrent Pharma,

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