How to determine the sulphite content in sample by any classical analysis?

Dear all, I wish to know the sulphite content from liquid sample. which may be around 3 to 4% Max. Please suggest me any classical/titration method for the same.

31 December 2016 674 0 View

What is the CIPAC code for 1000 ppm water?

As, 342 ppm = D 1500 ppm = E 5000 ppm = F 8000 ppm = G water. please mention the CODE of for 1000 ppm water in CIPAC

01 February 2015 9,063 1 View

How & why PEG is differentiated in different numbers like PEG-200, PEG-400 & etc.

Kindly give the answer for the PEG.

07 August 2014 2,760 6 View

Does anyone have information about Emulsifiable Concentrate (EC or E).

Please give any information regarding the same in view of Agrochemicals.

07 August 2014 628 1 View

How can we control the conversion of Benzaldehyde to Benzoic acid? If it happens kindly give the methods to reconvert as Benzaldehyde.

Sometimes it is found that Benzaldehyde shows two spots on TLC. I have been countered this problem by washing the impure Benzaldehyde (solubilize in solvent) by calcium carbonate solution. Further...

07 August 2014 2,906 7 View

Why ammonia has specific smell?

When we open a bottle containing ammonia we find a specific smell. I have been asked the question but yet been received any satisfactory answer. Some answers I got are, 1) Low volume high...

06 July 2014 1,940 3 View

Are there any reliable methods for the preparation of crystal?

I have some heterocyclic compounds in pure form (confirmed by authentic spectral techniques), in view of further applicative studies I would like to prepare crystals of each compound.

06 July 2014 886 3 View

I have prepared crystals of some -N and -S containing heterocycles but only a few (1 or 2) of them showed diffraction, why is this?

The synthesized compounds were confirmed by authentic spectral techniques like IR, NMR, GCMS. but only few (1 or 2) of them showed diffraction, even other compounds are derivatives of the same.

06 July 2014 2,917 4 View

Does NaCl act as a micronutrient?

In view of NaCl importance in human beings is it a micronutrient? It is essential component of food, composed of Na & Cl. I would like to know that NaCl (Sodium Chloride) is under the category...

06 July 2014 1,399 9 View

What is the difference between Conference, Seminar, Symposium & Workshop?

Dear one & all Kindly give the details for the difference between Conference, Seminar, Symposium & Workshop.

06 July 2014 1,759 41 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MD MOE RMSD

How to calculate the RMSD values for a MD simulation using MOE?

07 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View