© Copyright Statement

© Copyright Statement
All rights reserved. All material in this document is, unless otherwise stated, the
property of FPC International, Inc. Copyright and other intellectual property
laws protect these materials. Reproduction or retransmission of the materials, in
whole or in part, in any manner, without the prior written consent of the copyright
holder, is a violation of copyright law.

UHI TECHNICAL BULLETIN January 1993
THE BIOCIDAL ACTIVITY
OF FPC-l®
Microbial growth in distillate fuels can be a significant problem to diesel fleet operators. The
microbial colonies propagate at the fuel-water interface and, if fuel water can be totally
eliminated, the problem of microbial growth is also eliminated. However, total elimination of
water is difficult to obtain in practice.
One of the active components of FPC-l ® Fuel Performance Catalyst is a recognized antimicrobial
agent (phenol coefficient = 6). At the recommended mixing ratio (1 part FPC-l ®/5000
parts fuel), fuel treated with FPC-l ® contains approximately 5 parts per million (ppm) of this
biocide.
Laboratory tests on simulated samples and filters used in the field show the biocide in FPC-1 ®
concentrates in any water present in the fuel and/or filter, and can attain levels that eradicate
microbial colonies. Once the microbes are killed, the same chemical becomes a biostat,
preventing renewed propagation of microbial colonies in the fuel system. The concentration of
the biocide ingredient in FPC-l ® taken from filters and submitted for analysis was in the range of
75 ppm to 300 ppm, depending upon the water content of the filter.
A recent report demonstrates the effect of the biocide under controlled laboratory conditions.
Three aqueous solutions containing 88, 176, and 294 ppm of the FPC-l@ biocide were made up
and tested for biocidal effectiveness. These concentrations correspond to the probable range of
biocide accumulation encountered in actual practice.
Samples of distilled water were inoculated with bacteria and treated with varying amounts of the
FPC-l ® biocide ingredient. The results are tabled below:
Sample
Control Sample A
Control Sample B
Control Sample A*
Control Sample B*
Test Sample 1 A*
Test Sample 1 B*
Test Sample 2 A *
Test Sample 2 B*
Test Sample 3 A *
Test Sample 3 B*
Biocide PPM
o
ooo
88
88
176
176
294
294
Total Bacteria/ml
8200
8300
8800
9500
720
630
1
o
1
.After one hour of contact, solution plated, incubated and reading taken.
UHI CORPORATION 2230 N. University Parkway. Suite 5B. Provo. Utah 84604
Phone (SOl) 374·9010 Fax ISIlI) 374-()~45