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

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

How can the lactose content in milk be determined using HPLC?

Looking for a method to do this.

11 December 2012 7,014 8 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

Discrete Phase model (DPM) particle break-up has particle size limits during particle tracking?

Hello, I am currently working on simulating water droplet partciles in a closed room. When I use uniform particles, without "particle break-up", I can carry out the simulation without any problem....

02 March 2021 3,053 2 View

How to simultaneously perform multiple biochemical assays?

I am a research scholar working on heavy metal stress on plants. I will be doing biochemical characterisation( protein, carbohydrate, proline, antioxidant enzymes and many more assays) at interval...

01 March 2021 6,999 3 View

Distribution of particles in metal matrix?

How would define the "good" and "poor" distribution of particles within the matrix. Is there a quantitative solution to assess the distribution of the particles, which then having denotation of...

28 February 2021 7,397 8 View

Is there a deep reason for using the squared modulus of the wave function as the probability density of the existence of the particle?

I think we were all surprised at the first time we got to know quantum mechanics that the squared modulus of the wave function is the probability density of the existence of the particle? The role...

28 February 2021 6,282 9 View

Zno nano particles colour changed from white to grey in process of calcination any suggestions?

In the formation of Zno nano particles process, after drying at 120 degree C, my zno nano particles are completely white but when i calcine it for 450 degree C it converts into grey colour. i...

26 February 2021 2,435 4 View

Why there are two peaks while using the mie plot of Silver nanoparticle?

Hi, I am trying to learn the theoretical modelling of silver nanoparticle using the Mie scattering theory. After that, I discovered a software named Mieplot developed by Philip Laven, where it...

25 February 2021 7,493 6 View

Why is NH4OH added in heavy metals limit test?

The limit test I'm referring to is USP method II. In this procedure you need to dropwise add 6N of NH4OH to the sample until it the pH is alkali. After that you need to dilute and add HOAc until...

23 February 2021 2,049 3 View

Is this the write procedure for acid digestion of soil for heavy metal analysis using AAS?

How to do acid digestion of soil sample with 3:1 aquaregia in an open vessel?

23 February 2021 3,053 7 View

Physical-chemical formation of stalactites/stalagmites. what promotes the formation/growth of these structures?

I know, or think I do, the basic idea behind these natural structures, as from what I know they form due to water dripping from the top leaving a salt deposit behind. But started to wonder about...

22 February 2021 1,400 4 View

Is there an ideal incubation time of RGO-modified SPCE before subsequent use, i.e., electrochemical characterization or further modification?

I notice that upon washing and air-drying of my RGO/SPCE surface and characterizing again via DPV, the current response towards ferricyanide probe significantly decreases. My worry is that the...

22 February 2021 5,324 3 View