Hi strob
Looks like you guessed that I was hinting at volume overload! The problem is likely to be the basicity of these compounds. I've seen a number of methods that either use higher pH mobile phase (using ammonium formate) to get better peak shape…
It’s all about transmission
Raman spectroscopy has already demonstrated itself to be a useful analytical method in laboratory and process settings, owing to straightforward optical setups, highly specific chemical signatures in spectra, and the ability…
Hello,
To download a report on equipment usage in a CSV or Excel file format, please follow these steps:
Log into your iLab account.
Navigate to the Core facility page .
Click on the "Reporting" tab at the top of the page.
On the right side…
Hello,
As I said in a previous post, the sample prep method object and field items were added in CDS 2.7 to the available report objects. It looks like from your screenshot you have CDS 2.5 installed so those will not be options.
Marty
Saturation is reported by ion, not by TIC abundance.
The maximum possible abundance per ion on SQ instruments is approximately 8.4 × 10^6. To stay within the linear range of the electron multiplier it is recommended to be <= 2.0 × 10^6 per ion.
Please…
This Information Applies To: Agilent GC Systems
Issue
Excessive baseline noise can be introduced at different points including sample preparation, sample introduction, separation, and the detector. The excessive background can cause reduced signal...
This Information Applies To: Agilent GC Systems
Issue
Baseline instability that is not reproducible across multiple runs can be introduced at different points including sample introduction, separation, and the detector. The baseline instability...
This Information Applies To: Agilent GC Systems
Issue
Peak fronting is present in a chromatography peak when it has an excessive asymmetry with a leading edge. A normal peak is almost symmetrical.
Other chromatographic problems are identified...
This Information Applies To: Agilent GC Systems
Issue
A shift in retention time can occur for single, multiple or all peaks.
Other chromatographic problems are identified in Basic Troubleshooting for GC Systems . Regular maintenance of your instrument...
This Information Applies To: Agilent GC Systems
Issue
A change in peak size can occur for single, multiple or all peaks.
Other chromatographic problems are identified in Basic Troubleshooting for GC Systems . Regular maintenance of your instrument...
This Information Applies To: Agilent GC Systems
Issue
Peak splitting is when a single compound is shown in the chromatogram as two peaks usually unresolved, or one of the peaks is a shoulder.
Other chromatographic problems are identified in Basic...
This Information Applies To: Agilent GC Systems
Issue
This test isolates the point of contamination to the sample introduction system, which includes the gas supply, gas supply lines, and the sample inlet. It does not include the syringe or autosampler...
This Information Applies To: Agilent GC systems
Issue
Peak tailing is present in a chromatography peak when it has an excessive asymmetry with a trailing edge. A normal peak is almost symmetrical.
Other chromatographic problems are identified...
T his Information Applies To: Agilent 8890/8860/7890/7820/6850/6890 GC Systems with TCD (Thermal Conductivity Detector)
Issue
Problems observed with thermal conductivity detector (TCD) results can have different underlying causes.
Resolution...
This Information Applies To: All GCs, 6890, 6850, 7890, 7820, 8890/8860, Intuvo 9000
Issue:
This article is a troubleshooting guide for when the Flame Ionization Detector (FID) does not ignite or the flame keeps going out.
Cause:
If the FID...