Lwfhp Yvl

24 Questions 23 Answers 0 Followers

Questions related from Lwfhp Yvl

What suitable analytical method do you suggest for the analysis of famotidine?

what suitable analytical method for analysis of famotidine?

11 November 2015 8,986 5 View

What is the new in organic chemistry?

what are the new topics in organic chemistry?

09 September 2015 835 3 View

I need a simple way to measure carbon monoxide in the air

I need a simple way to easure carbon monoxide in the air

10 October 2014 8,578 1 View

What does ultrasonic assisted exraction mean?

04 April 2014 9,298 6 View

I want to analyze amino acids. Are there any suggestions of the possible difficulties ?

I want to use LC/MS. Any suggestions on how to do so?

04 April 2014 8,408 4 View

When comparing between methanol and acetonitrile to separate sugars why did acetonitrile give the best separation?

Comparing between methanol and acetonitrile to separate sugars by LC/MS we got a better signal using acetonitrile. NH2 column methanol:water acetonitrile:water

04 April 2014 9,972 4 View

Why can't reversed phase columns be used for underivatized sugars?

see above

04 April 2014 5,335 5 View

Why does formic acid give bad separation when used to improve the separation in separation sugars?

What is the effect of the formic acid in this case?

04 April 2014 5,299 4 View

What is the difference between recovery check and spike of a sample?

See above

04 April 2014 2,809 10 View

Why can HILIC separate ionic compounds?

see above

04 April 2014 3,572 4 View

What does universal bulk property detector in chromatography mean?

Is there another kind?

04 April 2014 6,034 3 View

Why does a guard column improve separation?

When I use guard column it improves separation

04 April 2014 3,367 5 View

What does conductivity mean (nonsuppressed and suppressed)?

See above

04 April 2014 2,691 2 View

Why is a buffer used in ion exchange?

See above

04 April 2014 8,120 3 View

What does the following sentence mean? "In HPLC the sample is retarded by specific chemical or physical interactions with the stationary phase".

As above.

03 March 2014 2,101 7 View

What does this word mean "an aliquot of the sample"?

03 March 2014 5,509 5 View

What is the difference between silica gels and bare silica?

Silica gels and bare silica

03 March 2014 4,931 5 View

What do LC/IR and LC/NMR mean?

I want information about LC/IR and LC/NMR.

03 March 2014 8,311 2 View

Why is reversed-phase (RP) used most frequently in contemporary HPLC practice?

reversed-phase (RP)

03 March 2014 1,329 10 View

Can anyone explain to me what monolithic column means?

see above

03 March 2014 7,937 4 View

Why can we not use reversed phase to analyse sugars?

03 March 2014 2,962 9 View

What are optimized conditions to determine carbohydrate by using LC/MS ?

Temperature of the column, kinds of the mobile phase and the flow rate of the mobile phase.

03 March 2013 7,646 4 View

Which is better use: evaporative light-scattering detection or refractive index detection in sugar analysis by HPLC?

02 February 2013 925 3 View

Why is HPLC better for the analysis of sugars?

HPLC.

02 February 2013 3,483 3 View