Is it possible to determine hydroxyl value by 859 Trioterm? If yes, how ? If no, what is the alternative for this determination?

More Botros S Meglaa's questions See All

What the method of preparation of Trimethylolpropane trimethacrylate (TMPTMA) ?

How can I prepare Trimethylolpropane trimethacrylate (TMPTMA)? I know that I have to start with Trimethylol propane (TMP) and methacrylic acid (MAA) in 1:3 but I don't know the right condition to...

11 January 2022 9,085 3 View

How to calculate the degree of branching for a polyester hyperbranched polymer,from 1HNMR data?

I have 1HNMR data. But we do not know how to quantify the degree of branching for the hyperbranched polymers from the area under the curve. Please suggest step by step procedure how to quantify...

25 June 2020 9,885 0 View

How can I get the theoretical Hydroxyl number of reaction of -COOH of polyester with epoxy group of any compound ?

I need to know the theoretical calculation of Hydroxyl number of reaction of -COOH of polyester with epoxy group of any compound

24 July 2018 7,614 3 View

Can anyone send me an ASTM method for determination acidity of MDI for use in the production of polyurethane?

I need an ASTM method for determination acidity of MDI for use in the production of polyurethane to avoid gellation.

08 September 2017 965 5 View

Is it possible to determine hydroxyl value by 859 Trioterm? If yes, how ? If no, what is the alternative for this determination?

I search an accurate method for determiantion hydroxyl value in Hydroxy acrylic resin, saturated polyester resin and alkyd resin.

15 March 2017 2,068 3 View

Can anyone support me with reference or paper about reactivity ratio of acrylate monomers in hydroxy acrylic, TPA and TSA solvent born?

Reactivity ratio of monomer in polymerization reaction

11 December 2015 9,409 1 View

What are the keys for reading an IR chart for Acrylic polymer Solvent borne, saturated polyester and adhesive flexible packaging?

How can i read IR chart ?

16 November 2015 8,960 5 View

What are the keys for reading an IR chart for Acrylic polymer Solvent borne, saturated polyester and adhesive flexible packaging?

How can i read IR chart ?

10 November 2015 6,246 6 View

• What the possible Persistent Organic Pollutants and Heavy metals present in fluorspar, sediments, and water bodies around its mining area?

Approximate concentrations are require in compared with the WHO permissible limts

11 August 2024 2,723 1 View

Basis set and input instruction to calculate HOMO and LUMO using Orca for Imidazolium based organic salts?

Hey there, As a synthetic chemist delving into theoretical calculations for my imidazolium-based organic molecules, I would greatly appreciate any guidance on the appropriate input instructions...

09 August 2024 5,444 7 View

How to calculate CCS for Sodiated adduct ions and Multiply Charged Ions?

I'm currently working on calculating the collision cross section (CCS) for various ions, and I'm facing challenges when dealing with sodiated and multiply charged ions. Most of the resources I’ve...

08 August 2024 8,329 0 View

Separation of organic acids-HPLC?

Hello What should be done to separate and identify organic acids in HPC when their RetTime is the same?Like oxalic acid with Propanoic Acid.or acids that have a very close RetTime.

07 August 2024 8,782 3 View

How to convert g/kg Humic acid dose to kg/ha?

I used humic acid at 0.044 g/kg soil in my pot experiment. But finally, I have to recommend kg/ha. Each pot's soil weight was 11 kg. What is the solution?

02 August 2024 7,186 6 View

Should I remove an item from a scale to raise Cronbach's alpha and McDonald's omega or is it better to leave it if they are both over .7 already?

Hello! I have this scale which had 10 items initially. I had to remove items 8 and 10 because they correlated negatively with the scale, and then I removed item 9 because Cronbach's alpha and...

01 August 2024 4,606 7 View

Why 3 replicates for most biological assays? Is it enough to examine the data fits normal distribution?

Just bounced on me. Before statistically analysing significant difference, shouldn't we see if data fits normal distribution first? Is 3 replicates enough to testify the hypothesis of normal...

31 July 2024 8,141 13 View

Posthoc test lettering in JAMOVI?

Does anyone know of a module for the JAMOVI software that is capable of generating mean separations using the classic letters based on post hoc results (e.g., Tukey test)? If, as I believe, such...

31 July 2024 3,333 4 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

Inquiry on Maximum Nucleic Acid Volume for 2.5 mL Liposome Solution?

I am currently working on a project involving liposomes and need to determine the maximum volume of siRNA that can be added to a 2.5 mL liposome solution with a total lipid concentration of 10...

30 July 2024 6,420 1 View

Abdelkader BOUAZIZ

Dear Botros;

this is the ASTM standard method.

ASTM E222 - 10

Standard Test Methods for Hydroxyl Groups Using Acetic Anhydride Acetylation.

Regards

Navneet Kumar

Dear Botros,

Determine hydroxyl value by 859 Trioterm is not possible, But possible by other instrument of Titrando - Metrohm; As followed by ASTM E 1899-08.

Other methods are available ASTM D 4274-99 or ISO : 4629.

Regards,

Botros S Meglaa

many thanks dears Abdelkader BOUAZIZ and Navneet Kumar