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TABLE 2. METROHM-PEAK IC-MS OPERATING CONDITIONS*<br />

Ion Chromatograph<br />

Metrohm-Peak, Houston, TX<br />

Mobile Phase<br />

30 mM NaOH/30% Methanol<br />

Guard and Separator Columns Metrohm ASUPP4/5 + ASUPP5-100, 100 mm X 4 mm<br />

Flow Rate<br />

0.7 mL/min<br />

Suppressor Regenerant 60 mM nitric acid/10% Methanol, Rinse 10% Methanol<br />

Column Temperature 30 O C<br />

Injection Volume 100 µL<br />

Mass Spectrometer<br />

1100 Series MSD Quad SL, Agilent Technologies, Wilmington, DE<br />

Low Mass Resolution 0.65<br />

Capillary Voltage<br />

-2 kV<br />

Nitrogen Pressure<br />

80 psi<br />

Fragmentor Voltage 150 V<br />

Drying Gas Temperature 320 o C<br />

Drying Gas Flow Rate 9 - 10 L/min<br />

Selected Ion Monitoring m/z 99, 101, 107<br />

Mass Scan Range<br />

0.1 amu<br />

Dwell Time Per Mass 0.25 sec<br />

*Instrumentation, when specified, does not constitute endorsement. Brand names are included for<br />

illustration only.<br />

<strong>332</strong>.0-34

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