Kanapathy Semaselaun

7 Questions 11 Answers 0 Followers

Questions related from Kanapathy Semaselaun

Is it okay to test toluene in HPLC at 190 nm?

Hi everyone..I tried to analyse toluene in HPLC for low level at less than 1% by HPLC at 190 nm.I prepared toluene standard by weighing 0.02 g in 25 mL diluted with acetonitrile followed by...

08 February 2024 5,674 6 View

How to optimise a method when using column with different pore size?

We were trying to develop an HPLC method as an alternative to the titration method for active quantification for one of our products that contains two actives. We managed to develop the method...

02 June 2023 1,192 4 View

Can I shorten an HPLC run time based on the retention time of the target compound without waiting for others to elute?

Say I am analysing a sample containing analyte A and B with the retention time of each at 5 minutes and 11 minutes. If my target compound is analyte A, can I shorten the run time to 7 minutes or...

19 October 2022 856 5 View

Can recommend reliable melting point apparatus model?

Hello, We planning to purchase a melting point apparatus. It seem to be a simple apparatus but can someone share the reliable brands available in market?We often associate particular manufacturer...

17 September 2021 1,628 2 View

How to determine LOQ and LOD of titration?

Dear all, I used this link as guidance for titration (https://pdf4pro.com/view/validation-of-titration-methods-bikeitech-com-5a2e5f.html). According to this link, the series of solution with...

08 October 2020 3,186 7 View

Is using hydrogen or nitrogen as alternative to helium giving a reliable results?

I am in the midst of surveying GC models to buy.One of the model offers technology that uses hydrogen or nitrogen instead of helium. This obviously will be cost saving but how about the...

28 June 2020 1,478 1 View

Which brand of GC/MS is ideal?

We are considering to buy GC/MS. Can experts out there share your review with your current GC model?

26 June 2020 6,380 21 View