Can somebody tell me that what may be the possible IR peaks in 2-mercaptobenzothiazole ?

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How should I choose optimized pH value if the results for pH values ranging from 3-9 are same?

I have performed the optimization of pH ranging from 2-9 so that I can choose one pH value for subsequent experiments but the results pertaining to pH values from 3-9 are almost near.How do I...

02 March 2016 9,287 5 View

Can anyone explain what is actually compressive local stress in Raman spectra?

Attached file

01 February 2016 7,368 0 View

Adsorption of Pd(II) onto graphene oxide shows optimum pH at 6.0 but GO with quaternary ammonium salt shows optimum pH around 3-4. can anyone explain?

The adsorption of Pd(II) onto graphene oxide shows optimum pH at 6.0, whereas GO with quaternary ammonium salt shows optimum pH around 3-4. Attachment for graphene oxide on Pd(II)

31 December 2015 4,204 4 View

I have done silver nitrate test to remove bromine from my sample. EDX result is fine and not showing Br peak but in XPS I get Br . Why is it so?

The results are satisfied as per EDX as it is not giving Br peak. But XPS is showing 0.55% of Br....

11 December 2015 3,506 5 View

In raman spectra, after addition of metal ion to some graphitic material, will the intensity ratio of D to G bands increase or decrease?

What does the increased/decreased intensity of ID/IG imply?

11 December 2015 1,730 2 View

In interference studies to check the extraction of Pd(II), will the metal ions such as Hg(II) and Pt interfere along with Pd(II)? If yes/no. Why?

11 December 2015 1,416 1 View

Can anybody tell the formula for the % recovery of metal ions in adsorption process?

If i have found the concentration of the metal ion in the filterate . Now i want to check that how much % of the metal ion is recovered.

11 December 2015 8,862 3 View

In interference studies to check the extraction of Pd(II), will the metal ions such as Hg(II) and Pt interfere along with Pd(II)? If yes/no. Why?

In interference studies to check the extraction of Pd(II), will the metal ions such as Hg(II) and Pt interfere along with Pd(II)?

11 December 2015 947 1 View

Can Akaike's Information Criterion be used for both linear and non linear model?

AIC is a statistical methodology to compare the isotherm models

11 December 2015 6,376 6 View

Will H2PdCl4 and PdCl42- behave in a similar fashion for an adsorption study?

Actually I recovered palladium from a catalyst Pd/AC + 4HCl (aq) + H2O2 (aq) → H2PdCl4 (aq) + AC + 2H2O (i)l Now I wanted to know that whether as such I can use these palladium species for...

10 November 2014 3,961 3 View

Melt curve problem in qPCR?

Do these peaks in the curve indicate primer dimer or non-specific products?

01 August 2024 7,466 0 View

How to improve peaks separation in HPLC?

Hi everyone, I'd like to better separate two close peaks coming from a bioconversion sample, I'm currently using a C18 KromaPhase 4,6mm Ø.I. SCHARLAU, particle size (µm): 10, pore size (Å): 100,...

30 July 2024 435 3 View

How can we conduct DFT for solutions or mixtures ?

Can we conduct DFT studies for Ionic Liquids with Amines at various concentrations? If so, how can we proceed with these studies? Additionally, what parameters, besides IR, NMR, and HOMO-LUMO, can...

18 July 2024 319 1 View

What does an additional peak in FTIR between 3100 and 3300 nm affect the quality of the material, benzethonium chloride USP??

I do not know much about FTIR! The material Benzethonium Chloride USP was compared to a reference standard in regards to FTIR, as per the USP testing: Identification B. Infrared absorption (FTIR),...

16 July 2024 6,918 7 View

Validated HPLC method for the estimation of the Amphotericin B ?

During the release test of Amphotericin B using 1% Tween 80, i observed three peaks even in the standard. The first peak consistently yielded results around 500%, while the other peaks showed...

08 July 2024 1,330 0 View

Why there are no peaks at downfield NMR of Cobalt and Nickel complexes?

I synthesized some paramagnetic cobalt and nickel complexes (expected to be Co(II) and Ni(II)) using a bidentate ligand - N of pyridine ring (aromatic) and O of P=O (aliphatic), and I obtained...

03 July 2024 3,410 4 View

I have NMR,Mass spec,IR and uv of a mixture of three unknown compounds from natural products.I am attaching the data who can help me elucidate?

I isolated a mixture of three compounds from the stem bark of a plant . I have NMR, Mass spec, IR, and UV data. There are a lot of things I can't make meaning out of. Kindly help me with the...

02 July 2024 9,531 4 View

How can I put small FWHM in CasaXPS?

I'm trying to fitting Cu Auger peak into various state (Cu0, Cu+, CuI etc..) In Cu0, one of the peak's FWHM is 0.84 but when I try to enter smaller value than 0.89, "input error" is occured. How...

02 July 2024 4,932 3 View

What is the reason of appearance of 2 or 3 peaks in zeta potential analysis of sample?

Hello I have prepared metal nanoparticles and did zeta potential. Normally there is a single peak in sample but now there are 3 peaks. I prepared sample for analysis first I prepared 10 mg/mL...

30 June 2024 1,063 4 View

EDS or EDX concetration finder?

Hello everyone, I'm facing an issue with EDS software that prevents me from obtaining atomic or weight percentages for my scan. However, I do have access to the raw data, which shows intensity vs....

29 June 2024 6,664 14 View