Subject: HP ChemStation capabilities
From: Charles Brochu
Date: 6 Dec 1996 15:10:30 -0500
I would like to know if someone developped a macro to target Totals
(Homologues) for PCB's analysis (for example, total tetrachlorobiphenyls,
total pentachlorobiphenyls, etc.) using a mean relative response factor
(for example, three tetrachlorobiphenyls analytes response factors
averaged to give a mean RRF for the totals tetra...) I appreciate any
comments!
Serge Moore, Ph.D.,
Environment Quebec
Subject: Re: Screen Capture from Varian Saturn or Finnigan ITD
From: cminvms@prism.gatech.edu (Mass Spec Lab)
Date: 6 Dec 1996 15:11:10 -0500
Don & others
just to let you know that you can send any DOS app screen to the
clipboard while it is running in full screen mode in Windows by pressing
the key. Saves having to switch it into and out of windowed
mode.
--
UniTech
680 Northland Boulevard
Suite 9
Cincinnati
OH 45240, USA
Phone: 1-800-989-0144 / (513) 825-0144
Fax: (513) 825-0163
E-Mail: info@uni-tech.com
Web site: http://www.uni-tech.com
Don Magin wrote in article
<57d6vf$rj4@acmex.gatech.edu>...
} The data system for older Finnigan ITD and Varian Saturn systems is a
} DOS-based program. It will run under Windows, but within a window it
} runs very slowly; as a full-screen application, it isn't too bad. When
} I needed to use graphical data (spectra or chromatograms) for a paper,
} presentation, or report, I would have to start the data system from
} Windows (3.1), run it as a full-screen application until I got to the
} screen I wanted, then switch to the run-in-a-window mode in order to copy
} the screen to the clipboard. Then I would minimize the MS data system,
} and paste the screen image into a graphics package. Then a switch back
} to full screen mode to go to the next image I wanted, and repeat the
} cycle.
}
} I found a neat DOS-based screen grabber which works very well with the
} data system running in DOS. It is a TSR which is invoked by a hotkey
} combination. It saves the screen to a file in a directory which you can
} specify, but it requires a different program to convert it to a .GIF file
} (the utility to do this is included with the screen capture program, and
} can be run in a batch mode). Best of all, it's freeware. It is called
} CAPTUR22, copywrighted by Henrique Avila Vianna (1994), and is available
} as CAPTUR22.zip from 'www.shareware.com' (which is a great site!);
} search for it by name from files for the DOS platform.
}
} Now, when I have the screen I want to capture up, I just press
} C and a file appears in the directory of my choice. It even
} has the ability to automatically capture the screen every so many seconds
} up to a maximum of a specified number of screens (e.g., capture the
} screen every 10 seconds up to a maximum of 20 screens). The files are
} saved as PICTnnnn.CAP files, but a batch command will convert all of them
} to the corresponding .GIF files. It even preserves the color display of
} the Saturn (which saving to the clipboard doesn't).
}
} I plop these .GIF files right into Microsoft PowerPoint for
} presentations. I have printed them out using a color ink jet printer
} on special glossy paper, and matted them as poster presentations.
}
}
}
Subject: Vacuum pump discussion
From: cminvms@prism.gatech.edu (Mass Spec Lab)
Date: 6 Dec 1996 15:11:18 -0500
Hello
GC-MS systems are often sold with rotary pumps (rough pumps) that are of
relatively low capacity (1 - 5 m3/h). An engineer told me that the
turbomolecular pumps don't need more backing.
Then, what would be the effect of increasing the capacity of rough pumps
(changing them). Would this improve the overall vacuum (and flow tolerance) or
just increase the pump-down time. Is there a difference between turbo pumps and
diffusion pumps in this matter.
I'm aware of the fact that changing to higher capacity pumps (turbo./diff.)
would improve vacuum, but sometimes this is not possible (price, space,etc)
Cato Brede
Department of Chemistry, UiO, Norway.
