Irina Oshchepkova
- Total activity 302
- Last activity
- Member since
- Following 0 users
- Followed by 0 users
- Votes 0
- Subscriptions 17
Articles
Recent activity by Irina Oshchepkova-
pH Selection: Total Charges and Ionic Forms Curves and Calculations
DescriptionThe definition of total charge and its calculations as well as the ionic forms concentration calculations (by pKa only or pKa and LogD) may cause some confusion when using pH selector.So...
-
Installation: User settings reset to default after Windows profile reset or roaming profile cleanup
DescriptionAfter a Windows profile reset, roaming profile clean-up, or migration to a new PC, users may notice that their application customizations—such as toolbars, recent projects, and local pre...
-
License Server: Software functions for one user but fails for others on multi user workstations
DescriptionOn shared lab PCs or RDS systems, one user can run the application without license issues, but other users on the same machine cannot obtain a license or see “no license” errors. The cau...
-
AutoChrom: Steps to take when an Injection Fails
DescriptionWithin the project, each injection can be assigned a status: Planned, Complete, Postponed, or Failed. To modify the status of an injection, navigate to the Task menu, choose Handle Injec...
-
AutoChrom: How to update configuration of the project
DescriptionProject configuration can be adjusted at any stage. There may come a time when it is necessary to add additional columns, solvents, or samples to the project.SolutionIn the Instrument Co...
-
AutoChrom: Factors affecting recommended New Gradient Conditions
DescriptionWhen an AutoChrom project enters the Optimization wave, the initial processed dataset—based on the original gradient conditions—is carried over from the Screening wave or generated and p...
-
AutoChrom: Algorithm fails to recommend two New Gradient Conditions for Optimization wave
DescriptionAfter the user completes Screening and selects the best experiment, the selected condition and its processed data are passed to the Optimization wave (provided the strategy includes an o...
-
LC Simulator: Simulated chromatograms differ greatly from experimental data
DescriptionUsers run LC Simulator (or an AutoChrom, LC simulation module) and find that simulated retention times and peak shapes are far from their experimental chromatograms. Investigation shows ...
-
Spectrus: No peaks displayed on the chromatogram in Spectrus due to selection of non signal channel during import
DescriptionAfter importing LC data into Spectrus, the chromatogram may appear without peaks even though clear signals are visible in the vendor software. This typically occurs when a non‑analytical...
-
Spectrus: Using peak purity assessment to detect co elution
DescriptionEven when chromatographic peaks appear well‑resolved, they may contain contributions from more than one component. Peak purity assessment based on spectral changes across the peak can he...