Quadrupole Mass Spectrometer Essential Characteristics .docx

Essential characteristics Minimum Requirements:

-Intended for analysis of Total Trihalomethanes and Volatile Organic Compounds

- Equipment Includes -Gas Chromatograph Mass Analytical Equipment -Purge and Trap Concentration Injection Equipment -Control and Data Analysis Computer -Maximum size of Equipment is 300cm by 120cm -Principle of Operation is to support Air Force Bioenvironmental engineering and Civil Engineering operation of monitoring environmental analysis.

-Essential operating conditions are TTHMs and VOCs analysis capabilities using EPA 55.2 and EPA 524.2 -Functions Gas Chromatograph

1. Column Oven: Control availability +4°C to 450°C

1. Oven Precision: ±1%, temperature deviation: ±2°C.

1. Oven Program: Availability of 20 steps or more.

1. Oven has two exhaust fans (one for hot air and other for cool air) and they are capable to cool the unit from 450°C to 50°C within 3 to 4 minutes.

1. Selectivity of controlling carrier gas with constant linear velocity and constant flow rate.

Mass Spectrometer

1. Electron Ionizer.

1. Equipment has two filaments which are automatic changeable during conducting analysis.

1. Ion source temperature control: 150 to 300 °C.

1. Filament of ion source has shield plate which controls heat radiation and acceleration voltage.

1. Helium, hydrogen and nitrogen are selectable as carrier gas.

1. Electronic voltage setting range: 10 to 200 eV or above.

1. Electronic current range: 5 to 250 µA or above.

1. The structures of filament and ion source box are simple enough that customer can provide maintenance by themselves.

1. Mass range: Changeable between m/z 1.6 to 1090 or above.

1. Max column flow: 15mL/mil or above.

1. Detector: Secondary electron multiplier.

1. Turbo pump adopts differential exhaust system and has total exhaust volume more than 225 L/sec.

1. Equipment including vacuum control system is controllable from PC.

1. There has ion gauge as vacuum measuring device.

1. It has 20,000 µ/sec scan speed.

1. It has more than S/N≥1500 (1pg OFN m/z272) EI sensitivity at scan mode

1. Equipment has automated stop mode.

Purge and Trap Concentration Injection

1. Vial temperature: 35 °C to 100°C.

1. Trap piping desorbing temperature is capable max 350°C.

1. Trap piping shape should be straight.

1. Auto sampler handles more than 56 samples.

1. Auto samples has vial cooling function which uses electronic cooling system.

1. It has internal standard addition function.

1. It has quality control log function such as sample log and error log.

1. Nitrogen is available to use to purge gas.

1. Trap piping is available to share with mold smell and volatile organic compound analysis

1. Its operation system has help function which shows step by step process for maintenance such as changing trap piping.

1. Its software is capable both of English and Japanese.

PC can control Gas Chromatograph Mass Spectrum and Purge software are capable in English and Japanese