Hello,
We have an agilent 6545. Today when we are doing a mass calibration check, the masses of the negative tune ions seems to be shifted (For example 1633.9988 is now showing 1639.2109 and so on for the other ions) and mass calibration check seems…
Hi,
Our QTOF system failed to do a polarity switch from positive to negative. But it works fine at the positive mode. Just wondering if anybody knows the problem. Here is the instrument log record:
Time EventType EventSource Category Description User…
Actually, you have to be sure that it's detector problem or not.
And if still problem persist and after changing lamps intensity test, wavelength test failed again then you have to call to your local agilent support to check electronics and optics etc…
Hi, I am using Agilent 7820A GC-FID with EZChrom Elite v3.3.2. software. After the completion of each sequence, I would like to automatically generate a .text file along .dat file. So far, after the sequence has ended, I process the sequence and then…
As long as you do not see any issues in your measurements, you can keep using the EM, until your new EM has arrived. At some point the Pulse HV will reach ~1800 V and the Analog HV will reach ~ 3300 V (if you are lucky). After that you will have to replace…
Hello, my friend, After checking the logbook on the ChemStation, note that the method did not run due to an error in the G4212B detector indicating: Start Failed (temperature HW). After that, I checked the instrument with the Lab Advisor, and the Logbook…
Hello,
The RI uses a lamp and since it's works on refractive index differences, it doesn't use a wavelength. The RI is what is called a "bulk" detector.
If you are thinking you can replace the lamp, it's part of the optical unit and when it fails…
Good Evening, I realize this is a bizzare question but basically what we have is a Dean Switch GCMS system and we use cut windows to determine when the best time is to switch from column 1 (inlet to switch to 3rd column - vent) to column 2 (inlet column…
Hello team, I wanted to consult the following: an HPLC 1260, I had to reinstall the software. Once I did it, after creating a new method and giving the order to inject, the software turns blue and immediately turns green and does not inject... After checking…
I am trying to quantify ethyl lactate in ethanol 20% (remainder water). When I run multiple injections, the RSD is 6-8% for the ethyl lactate peak. The ethyl lactate standard should be 0.2% v/v. We typically test samples that are 95-100% ethanol and use…
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...