Reasons for ticking sound from foreline oil pump in GCMS?

regular ticking sound from GCMS foreline oil pump, the sound incrase during injection

09 October 2017 9,526 2 View

Dear all , i need answer for those question :How can you prepare and seprate nanobiomaterials, prepare of surface modification of metal particles ?

31 December 2015 3,625 3 View

Can anyone suggest a suitable solvent for GCMS?

06 July 2014 4,819 29 View

Inlet in GCMS

what's the function of inlet in GCMS , and what's the advantages of Multi mode inlet over other types ?

06 July 2014 9,020 1 View

How can I calculate LOD and LOQ for sugars in honey (fructose, Glucose ,Sucrose) when they are measured by HPLC , RI detector, NH2 Column?

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01 February 2014 9,191 8 View

What is the best LC - Column for carbohydrate analysis?

If I have the choice between 2 amino columns for carbohydrate analysis: Luna amino column from phenomenex and Pinnacle from restek which one should I choose?

10 November 2013 3,337 6 View

Does anyone have experience with amino acid determination of amino acids by GC-MS using a EZ-Fast kit?

Does anyone have experience with amino acid determination of amino acids by GC-MS using a EZ-Fast kit and its advantage over an amino acid analyzer.

08 September 2013 4,547 4 View

Citric acid, malic acid and lactic acid by HPLC

I need a standard method for the determination of citric acid, malic acid and lactic acid in antiseptics (detergents) by HPLC

01 February 2013 6,569 7 View

Rezex column

does any one use rezex column for carbohydrate analysis by HPLC?

09 October 2012 9,931 0 View

Rezex column for carbohydrates analysis

Does any one use rezex column for carbohydrates which is an ion exchange column? Is it more accurate than amino column for sugar analysis?

09 October 2012 6,167 13 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

Waters 2707 HPLC autosampler problem?

I am using a 2707 waters HPLC device. When I try to inject a sample, it says missing plate or rack. I changed the needle and calibrated its position but I still get the same problem. I even get...

02 March 2021 1,408 1 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

How optimize the Size Exclusion Chromatography?

Hello! I'll do a size exclusion chromatography, but I only have an open column, and I'll perform the peptide extraction from yeast, using buffer lysis (sodium phosphate 50 mM/NaCl 30 mM/DNAse and...

01 March 2021 2,215 2 View

Does anyone know HRM channel in a 2 plex QIAGEN Rotor- Gene Q qPCR can be used as a separate channel?

I am going to have 3 different probes in my qPCR work that I am going to do. But I realized that the machine we have in the lab is a Rotor-Gene Q 2plex HRM Platform, saying it has green, yellow,...

01 March 2021 8,544 1 View

I have designed reflectarray element and feeding it though Horn Antenna on HFSS. After full wave simulation, I am not getting desired results?

I have designed reflectarray element to generate OAM beams at 5.8GHz and feeding it though Horn Antenna on HFSS. After full wave simulation, i am not getting desired results i.e Radiation pattern...

01 March 2021 9,701 5 View

Precipitate after adding laemmli buffer to protein solution containing Potassium Acetate?

Hi, I am running a size exclusion chromatography experiment with a buffer containing Potassium Acetate as a salt. I analyse these fractions through SDS-PAGE. After boiling my SEC fractions in...

01 March 2021 2,622 3 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

Microstrip antenna design tutorial of HFSS 3D layout module ?

I have designed a 24 GHz rectangular antenna on HFSS 3D model and got desired results while desing the same antenna with same dimensions I am getting resonance frequency at 27 GHz I am...

28 February 2021 4,426 2 View