2010 INTRODUCTION
This part deals primarily with measurement of the physical
properties of a sample, as distinguished from the concentra-
tions of chemical or biological components. Many of the
determinations included here, such as color, electrical con-
ductivity, and turbidity, fit this category unequivocally. How-
ever, physical properties cannot be divorced entirely from
chemical composition, and some of the techniques of this part
measure aggregate properties resulting from the presence of a
number of constituents. Others, for example, calcium carbon-
ate saturation, are related to, or depend on, chemical tests.
Also included here are tests for appearance, odor, and taste,
which have been classified traditionally among physical prop-
erties, although the point could be argued. Finally, Section
2710, Tests on Sludges, includes certain biochemical tests.
However, for convenience they are grouped with the other
tests used for sludge.
With these minor exceptions, the contents of this part have
been kept reasonably faithful to its name. Most of the methods
included are either inherently or at least traditionally physical, as
distinguished from the explicitly chemical, radiological, biolog-
ical, or bacteriological methods of other parts.
1
1
/
1
100%