speed of analysis, and adequate sensitivity were attained. And the results obtained were comparable to the results of an established ASTM method.Concerning cost of equipment, a GC already owned by a laboratory can be used if it is equipped with an FPD and a gas mixing device, or a very inexpensive GC may be purchased. Even if all the necessary equipment has to be purchased, costs are only a little more than those required for the Lamp Method. Amortization of the equipment can readily be seen in the following rationale: The Lamp Method can analyze 12 samples per man day and a lead correction is necessary. The FPD method can analyze 60 samples per man day and no lead content correction is necessary. A fivefold increase in throughput is anticipated using the same staffing level. At an assumed figure of $80/man day the costs for replacing the Lamp Method by the GC/FPD are amortizable in less than three weeks.
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