Date:	April 21, 1998

Objectives:

Run testing on Electrolyzer and begin to sample the product water of a single cell test fixture, using Nafion 1135 membrnae, and 0.4 mg, 20% Pt on C E-Tek electrodes.

Procedure Utilized:

Standard measurement practice of sweep the voltage from an open circuit potential to a minimum potential of 1.0V and back up to the open circuit potential. The sweep will be carried out as a Tafel sweep. The cell will be held at a constant pressure of 1 bar for 5 days. The temperature will be held constant at 70, 65, 55 for the Anode, Cathode, and cell respectivly. The product water will be sampled during each and during each steady state (daily) measurement. The steday state measursments will be at a constant potential of 0.5-0.6V. All samples will be compiled in triplicate for statistical analysis.

Environment:

Temperature-	70 degrees F

Barometer-	NA

Relative Humidity-	NA

Methods:

1.	Test the membrane and electrode assembly for pinholes, pressurize one side with nitrogen and look for gas transmission across the membrane.

2.	Set temperature parameters and all a standard breakin of 24 hours at a low current density.

3.	Apply pressure parameters and begin Tafel sweeps. (Optimal sweep rate will be determined at time of evaluation).

4.	Collect 3 samples of water for analysis (ICP-MS, need 10 L of Nitric acid for a 10ml sample). Store samples for a period of no more than one week. TOC analysis samples should be run that day if possible. GC-MS will be used for Electrolysis only. Samples will be compressedslightly before analysis.

5.