From a quick google search, it appears that hydroquinone may be detectable through LC/MS (ESI) in both positive and negative mode. It forms a protonated molecule ([M+H]+) at m/z 111 in positive mode and two ions at m/z 108 and 109 in negative mode.
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奔跑的小短腿 , While an LC/MS system may operate in both positive and negative ion polarity modes, it will switch between the two polarities based on the user input in the acquisition software. It is not possible to acquire in both polarities simultaneously…
Hi Vincenzo,
Thank you for your answer. We have the CFR environment. WinUV 5.1.3.1042. (1042 indicates Part11).
I’ve looked for method files for the following apps; Advanced Reads which are .MAB, Concentration .MCN, Scan .MSW, and Simple Reads .MSR…
Hello, you can export sequences into a new project file.
- Select a sequence of a loaded project and click Export data in the [project management] window.
- The now open window allows you to select more sequences from this project to export (see…
Depending on the software, linear and/or polynomial regression models are supported. Strictly speaking, linear fits can only be used for linear columns. However, it is also observed here that a polynomial fit may be more suitable depending on the column…
As you have already mentioned, HFIP is a very aggressive solvent that has a high density at a low boiling point.
Note that only the external degassers G1322/G7122 are compatible with HFIP. HFIP analyses are usually run with KTFAc as a salt additive…
Hello,
Typically, it is difficult to determine the issues with AV and security software within the logs. You could look into the acquisition server logs around the time the crash happened. I would also look at the windows event logs for other activity…
The Agilent TRS100 Quantitative Pharmaceutical Analysis system has been certified with My Green Lab’s ACT label in the EU, UK, and US. This clear, third-party verified information about the system’s environmental impact makes it easy for laboratories…
This Information Applies To: Agilent 5200/5300/5400 Fragment Analyzer systems, RNA kit (15 nt) (p/n DNF-471-0500/1000), HS RNA kit (15 nt) (p/n DNF-472-0500/1000), Small RNA kit (p/n DNF-470-0275)
Issue
Which kit should be used to analyze single...
This Information Applies To: Agilent 6820, 6890, 7820A GC systems with a Split/Splitless (SSL) inlet
Issue
Non-volatile sample matrix components will accumulate in the inlet liner and impact on analytical performance. The inlet liner should be changed...
This Information Applies To: Agilent headspace samplers (HS)
Issue
GC cycle time needs to be calculated correctly. Too short a GC cycle time will reduce sample quality and possibly stop the analysis prematurely. Too long GC cycle time can cause...
This Information Applies To: Agilent 7820A GC
Issue
7820A GC is designed with simplified keypad that comes with five buttons. They are Stop, Prep Run , Start, Up and Down arrow buttons. Changing the IP address requires a different method compared...
This Information Applies To: Agilent Single Needle Autosamplers
Background
Sometimes the user may observe liquid flowing from Port four on the autosampler injection valve. During an injection sequence, it is normal to have liquid from port four...
This Information Applies To: Agilent 4200, 4150, 2200 TapeStation systems
Issue
Can I run an assay using the ladder or sample buffer from a different assay if I have run out of the appropriate assay ladder or sample buffer? Is it possible to run...
This Information Applies To: Agilent ICP-MS 7700, 7800, 7850, 7900, 8800, and 8900 systems
Issue
Peristaltic pump tubing that has lost its elasticity will not deliver the sample to the nebulizer correctly. When the pump tubing appears limp or flattened...
This Information Applies To: Agilent AriaMx real-time PCR system
Issue
AriaMx touch screen displays error code 90 after the Instrument Health Check (IHC), which happens when the AriaMx is switched on, or after running the onboard diagnostic tests...
This Information Applies To: Agilent AriaMx real-time PCR system, AriaMx optical modules
Issue
AriaMx users can change which AriaMx optical modules are installed to upgrade the instrument capabilities or to troubleshoot.
Items Required
Any...
This Information Applies To: AriaMx real-time PCR system
Issue
Error 43 is displayed on the AriaMx touch screen. Error 43 is a voltage error and it normally indicates that the cartridge LED voltage or motor voltage being detected is abnormal. Sometimes...