Can you prepare the alkane standard in a different alkane, maybe heptane or octane? Boiling point of n-pentane is fairly close to room temperature (36 C) so you may be getting some evaporation of the lighter components in the sample. If there's enough…
Very useful video for basic understanding of the valve functionality. can you post some more videos on GREEN HOUSE GAS ANALYZER or TOGA System in this impressive and easiest way only.
This should take less than one hour. The ion source and quad(s) only need to be below 100° C and the high vacuum pumps - diffusion pump off and cold or the turbo pumps not spinning. Make sure that the GC transferline temperature is set to OFF or 0° C…
The GC inlet must have 20 ml/min or more total flow for good inlet pressure/flow control. If the total flow is too low, air can actually diffuse into the system and the oxygen will damage the column.
Using an Agilent Headspace Sampler the samples are…
Hello ljones031 ,
I would suggest copying the installation files to a folder on the local hard drive and then disconnecting any external drives before attempting installation. Most MassHunter programs will try to install to a D: drive it if is found…
Hello,
If you need the formatting of a table, it can be done that way. I do not like to use multiple hidden tables for that kind of report as they can be hard for later customization. The example below uses a single hidden table and custom code to…
Hello Marty,
thanks for your reply. I tested your hint. It worked and I'm confident to code the formula in the CC.
Thank you very much and have a nice weekend,
Sarah
Hello well ,
I know this is an old forum post, but just wanted to add to what ISH was saying.
The answer still stands, 6890 is not compatible with the 7650 ALS. The GC models it is compatible with are (at the time of this comment at least):
- 8890…
This Information Applies To: HES ion source in 5977B/C GC/MSD, 7010 triple quadrupole GC/MS systems
Issue
The filaments are replaced as part of routine maintenance, or when they break (zero output current).
Items Required
Gloves, nylon,...
This Information Applies To: Agilent 5977A/B/C GC/MSD
Issue
The Electron Multiplier Horn must be replaced when it is contaminated or the EMV value reaches 3000 V with a clean ion source.
Items Required
Electron multiplier horn (5977B/C:...
This Information Applies To: Agilent 5973/ 5975/5977 GC/MSD with rotary vane foreline pump
Issue:
The oil mist filter is recommended to be replaced annually. If the color of the filter has changed or there is smell from the filter, the oil mist...
This Information Applies To: Agilent EI Source
Issue:
During normal operation of the GC/MS, the EI SST/Inert ion source will need to be disassembled to proceed with abrasive ion source cleaning and / or routine replacement of consumable parts (filaments...
This Information Applies To: Agilent G7129A/B/C Vialsampler
Issue:
Replacing the needle and needle seat of the Vialsampler is required when:
The needle is visibly damaged.
Leaks or blockages in the vialsampler are observed, especially between...
This Information Applies To: Agilent G1311A/B/C, G7111A/B, Quaternary Pumps, and G1310A/B, G7110B Isocratic Pumps, G1312A/B/C, G7112B Binary Pumps
Issue:
How to diagnose no flow or no pressure issues on binary, quaternary, or isocratic pumps.
...
This Information Applies To: Agilent UV and RID detectors
Issue
A clogged flow cell causes high backpressure. The clog can be removed by flushing the system with solvents at high pressure. If you suspect a clog or experience high backpressure due...
This Information Applies To: Agilent G1312X and G7112X binary pumps.
Issue:
A blockage before the pressure sensor, e.g. in a pump head, will not give a high pressure or overpressure system error. Instead, the pump may show one of various error messages...
This Information Applies To: Agilent 1100, 1200, 1260 LC Pumps.
Issue:
The following procedure allows the cleaning of residue from the pump's check valves, often caused by polymerization of aged acetonitrile or salt-based solutions that may prevent...
This Information Applies To: Agilent LC Systems
Issue
After analyzing dirty or concentrated samples, some sample compounds may retain in the column and other parts of the HPLC system. If the column re-equilibration after each run is not enough to...