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ptr 9c

Proton-transfer-reaction mass spectrometry (PTR-MS) is an analytical chemistry technique that uses gas phase hydronium reagent ions which are produced in an ion source. PTR-MS is used for online monitoring of volatile organic compounds (VOCs) in ambient air and was developed in 1995 by scientists at the Institut für Ionenphysik at the Leopold-Franzens University in Innsbruck, Austria.
A PTR-MS instrument consists of an ion source that is directly connected to a drift tube (in contrast to SIFT-MS no mass filter is interconnected) and an analyzing system (quadrupole mass analyzer or time-of-flight mass spectrometer). Commercially available PTR-MS instruments have a response time of about 100 ms and reach a detection limit in the single digit pptv or even ppqv region. Established fields of application are environmental research, food and flavor science, biological research, medicine, security, cleanroom monitoring, etc.

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Recent contents
  1. djharteloo

    PTR 9C MP5 clone (package or just gun)

      1. For Sale
    • $850
    • Yacolt
    • Washington
    Switching up my pcc set up so this is on the chopping block. Ptr 9c mp5 clone, approximately 1500 rounds fired (about half suppressed). Functions fine, seems to prefer metal magazines (zenith and kci, haven’t tried actual hk mags). Will include factory end cap, factory skb hard case, hk wide...
  2. J

    PTR 9C MP5 Clone. Super Clean.

      1. For Sale
    • $1600
    • McMinnville
    • Oregon
    I have a PTR 9C 9mm MP5 clone. It has the sb tactical folding arm brace and Magpul handgaurd. Also comes with the original take off parts and everything that came in the case. Has about 400-500 rounds through it. Runs like a champ. It comes with the two factory clear mags That were never used. I...
  3. djharteloo

    Ptr 9c mp5 clone

      1. For Sale
    • $1500
    • Yacolt
    • Washington
    Had for a little over a year, really cool and super fun to shoot but moving on from a childhood dream to something more practical. Comes with an hk wide forend, 5-6 mags, ptr hard case, sb tactical brace, factory end cap and tool. Trade interests: Sig MCX Virtus/Rattler Stacotto C2/P Factory...
  4. NJ Escapee

    PTR 9C

      1. For Sale
    • $1650
    • Bothell
    • Washington
    Hi guys, just crossposting this over from WAGuns. Selling my PTR 9C. I am the second owner and between the previous owner and myself, I think this has about 3 boxes (150 rounds) of 9mm through it. Comes with - PTR case and documentation - 2x KCI Gen 2 MP5 30 rounders - Midwest Industries...

  5. PTR 9C BNIB WITH EXTRAS!

      1. For Sale
    • $2000
    • Beaverton
    • Oregon
    Hey y'all! Putting up my PTR 9c up for grabs. Bought it locally from OR Rifle Works for 2k and it is brand new in box with some sweet extras. I am including 3 gen 2 KCI mags (total of 5 mags) (no sight). Sad to see it go, but want it to go to a great home! Meet up at Tigard Pawn 4 More and...

  6. PTR 9C

      1. For Sale
    • $2000
    • Portland
    • Oregon
    No Longer for Sale
  7. kunu808

    PTR 9C

      1. For Trade
    • Beaverton
    • Oregon
    PTR9C, looking to trade for a nice quality AR15 rifle. 500rds through the gun.
  8. N

    PTR 9C MP5 Clone (Updated Price)

      1. For Sale
    • $1750
    • Monmouth
    • Oregon
    For Sale: - PTR 9C 9mm Pistol - SB Tactical Pistol Brace - 4 MP5 magazines (3 PTR & 1 ETC). - Original case, pistol butt plate, and single point sling, sight adjustment tool, and manual. Fun gun to shoot runs like a sewing machine as it should. Asking for $1950.00 , $1850.00, $1750.00 (Updated...
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