Astm D 3635 – 01 pdf free download

Standard Test Method for
Dissolved Copper In Electrical Insulating Oil By Atomic
Absorption Spectrophotometry 1

This standard is issued under the fixed designation D 3635; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of the last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope

1.1 This test method covers the determination of copper in
new or used electrical insulating oil of petroleum origin by
atomic absorption spectrophotometry.

1.2 The lowest limit of detectability is primarily dependent
upon the method of atomization, but also upon the energy
source, the fuel and oxidant, and the degree of electrical
expansion of the output signal. The lowest detectable concentration is usually considered to be equal to twice the maximum
variation of the background. For flame atomization, the lower
limit of detectability is generally in the order of 0.1 ppm or 0.1
mg/kg. For non-flame atomization, the lower limit of detectability is less than 0.01 ppm.

1.3 The values stated in SI units are to be regarded as the

1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. See 5.4 for specific
precautionary statements.

2. Referenced Documents

2.1 ASTM Standards:
D 1193 Specification for Reagent Water2
D 3487 Specification for Mineral Insulating Oil Used in
Electric Apparatus3
D 5222 Guide for High Fire-Point Mineral Electrical Insulating Oils3

3. Summary of Test Method

3.1 The test specimen of oil is filtered and diluted with an
appropriate organic solvent and analyzed in an atomic absorption spectrophotometer. Alternate procedures are provided fo

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