Skip navigation
All Places > Applications Areas

Basic Research

Log in to follow, share, and participate in this community. Not a member? Join Now!

Recent Activity

james_jenkins
GC USP Alcohol method for methanol limit test injection had retention time shift from 3.5 minutes with ~10M area counts to 20 minutes with area count 700K. Checked or replaced liner/O-ring, septum, carrier gas flow, syringe and gold seal. What else should I look into?
dek2311
Hello, I'm Dwi Eryono Kasih. I want to ask for help. I analyzed the glycerin sample using Agilent FTIR Cary 630. I used MicroLab software. The method used is qualitative method. After the analysis results are obtained, the analysis results should be compared with the existing standard in the library, namely ATR (62) for USP Reference Standard… (Show more)
in Basic Research
james_jenkins
I am currently about to measure a mixture of ethylene and ambient air with an Agilent 7890A. I want to inject it manually with a syringe in to the front inlet, following to this method   https://www.agilent.com/cs/library/applications/5991-4873EN.pdf    The columns are 19095P-Q04 and 19095P-MS0. No matter what I changed, I see only 2 peaks,… (Show more)
james_jenkins
Why Triethylamine and Piperidine peaks not elutes sometimes in headspace?? While rest of the peaks are eluting perfectly. Any ideas
arkanose
Dears All:   I have an inquiry about certificates of attending webinars, is it possible to get such certificates? If so ; how ?
in Basic Research
karin.valdes
Hi! which LC columns area recommended for GPC BIOPLASTIC (PLA) analysis?    
in Basic Research
marcus.jones
I am running amino acid analysis using the AdvancedBio AA 2.7um column. Needle wash is 50:50 mobile phase A with 0.4% phosphoric acid : mobile phase B (mobile phase A is 10mM di-sodium phosphate anhydrous, 10mM sodium tetraborate anhydrous pH 8.2, mobile phase B is 45: 45: 10 MeCN: MeOH: H2O). Seeing quite significant carryover in a blank after… (Show more)
in Basic Research
marcus.jones
I am running amino acid analysis using the AdvancedBio AA 2.7um column. Needle wash is 50:50 mobile phase A with 0.4% phosphoric acid : mobile phase B (mobile phase A is 10mM di-sodium phosphate anhydrous, 10mM sodium tetraborate anhydrous pH 8.2, mobile phase B is 45: 45: 10 MeCN: MeOH: H2O). Seeing quite significant carryover in a blank after… (Show more)
in Basic Research
fpmlab
Running a 7800 ICP-MS and during the past two weeks have been experiencing difficulties. The doubly charge percentage has continually risen with each day of testing. I have removed and cleaned the cones and lens stack and conditioned before use. I checked the nebulizer and spray chamber for blockages and build up and didn't find anything. I have… (Show more)
in Basic Research
james_jenkins
I'm not sure which solvent is suitable for HP-Chiral-20B column which is mid-polar. Do I need to concern about polarity that much since it is GC not HPLC? I saw some researches used hexane and also ethyl acetate. Unfortunately, my sample can dissolve well only in 55% acetonitrile. So, I would like to ask if I could use acetonitrile as solvent and… (Show more)
Load more items