طريقة الاختبار القياسية لتقدير عناصر محددة في زيوت التزييت المستعملة وغير المستعملة وزيوت الأساس بطريقة الحث البلازمي المزدوج السبكترومتري للانبعاث الذري
Standard Test Method for Multielement Determination of Used and Unused Lubricating Oils and Base Oils by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)
قطاع النفط والغاز
Oil and Gas Sector
1.1 This test method covers the determination of additive
elements, wear metals, and contaminants in used and unused
lubricating oils and base oils by inductively coupled plasma
atomic emission spectrometry (ICP-AES). The specific elements
are listed in Table 1.
1.2 This test method covers the determination of selected
elements, listed in Table 1, in re-refined and virgin base oils.
1.3 For analysis of any element using wavelengths below
190 nm, a vacuum or inert-gas optical path is required. The
determination of sodium and potassium is not possible on some
instruments having a limited spectral range.
1.4 This test method uses oil-soluble metals for calibration
and does not purport to quantitatively determine insoluble
particulates. Analytical results are particle size dependent, and
low results are obtained for particles larger than a few
1.5 Elements present at concentrations above the upper limit
of the calibration curves can be determined with additional,
appropriate dilutions and with no degradation of precision.
1.6 For elements other than calcium, sulfur, and zinc, the
low limits listed in Table 2 and Table 3 were estimated to be ten
times the repeatability standard deviation. For calcium, sulfur,
and zinc, the low limits represent the lowest concentrations
tested in the interlaboratory study.
1.7 The values stated in SI units are to be regarded as
standard. No other units of measurement are included in this
1.8 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, health, and environmental practices and determine
the applicability of regulatory limitations prior to use.
Specific warning statements are given in 6.1, 8.2, and 8.4.
1.9 This international standard was developed in accordance
with internationally recognized principles on standardization
established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations
issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
Purpose & Justification