18 Questions 145 Answers 0 Followers
Questions related from Senthamizh Selvan
Galvanic Cell or electrolytic cell ? What is the detection technique?
09 September 2012 4,218 2 View
I am mixing some chemicals along with propylene glycol with some aldehydes, in some instances there is a formation of acetal but other times not. Does anybody know the thermodynamics & kinetics...
08 August 2012 5,939 2 View
I need to compare two products of same brand by GC / GCMS, i have tried to extract the volatile part of the aqueous beverage by using CH2Cl2, pentane:diethyl ether; but the volatile are very less....
10 October 2011 2,140 6 View
Are the % area of TIC of GCMS and FID comparable? if not why? What is detector linearity? i worked with absolute % (Pharma) of sample composition and also % area composition (in CRO, Synthetic...
10 October 2011 7,707 3 View
It is better to be roughly right than precisely wrong. —John Maynard Keynes You all have probably heard the story about Malcolm Forbes, who once got lost floating for miles in one of his...
09 September 2011 2,526 2 View
Please share your opinion / comments / ideas / suggestion how could an young scientist think? how extend he could follow the old rules? how can i get recognition? Thanks Selvan
09 September 2011 2,944 0 View
Please tell me the Make/Model of super critical fluid extraction apparatus which can be used for analytical sample preparation. Thanks
09 September 2011 1,317 1 View
I have analysed a product-unkown by GCMS which is having lots of aliphatic alkanes and amines such asNonadecane Heptane, 2,4-dimethyl- Decane, 2,6,6-trimethyl- Decane,...
09 September 2011 6,418 4 View
I need to extract volatile materials from consumer products such as detergent, soaps and other perfumery products. usually the fragrance materials will be about 0.5 to 1.0 % in the consumer...
09 September 2011 5,856 1 View
What is the use of it.
09 September 2011 6,521 1 View
TIC - GCMS and FID Chromatogram; Which is the best way to quantify the ingredients in the area normalization method? why? Thanks
09 September 2011 4,354 5 View
Polyimide resin used for fix press-fit with Gc capillary column and how could i use effectively
09 September 2011 1,249 1 View
I am using 'Y' splitter for our GCMS, it connected tat column outlet and one part is going to MS and another is going to FID; i have a sensitivity problem in FID and RT differences ( TIC-MS is...
09 September 2011 4,685 7 View
I am using 4.5 grade Helium as carrier gas, it gives an intense 32 m/z peak for oxygen, I set the scan range 33-550 m/z to avoid peak at 32 m/z and increase S/N ratio ( i got the 2-3 fold of...
09 September 2011 1,250 7 View
What are retention indices in GC, GCMS?
09 September 2011 3,531 11 View
It is having GPIB Communication; old data acquisition software-HP Chemsation. data analysis is not so good. Sensitivity of the instrument is in question. How could I utilize the instrument...
09 September 2011 1,314 1 View
We have a classical method of analysis to determine volatile oil in the natural products. It is time consuming- taking 4 hours. How can I improve the tech? Many thanks
09 September 2011 1,838 2 View
I need manage my documents like protocol, reports, SOP, STP, Spreed sheets etc. please help me on this. Many thanks
08 August 2011 9,807 0 View
