Norm

ASTM D7751 - 11e1 en

Standard Test Method for Determination of Additive Elements in Lubricating Oils by EDXRF Analysis

  • Deze norm is ingetrokken sinds 01-12-2012

50,60 61,23 Incl BTW

Over deze norm

Status Ingetrokken
Aantal pagina's 6
Gepubliceerd op 01-10-2011
Taal Engels

1.1 This test method covers the quantitative determination of additive elements in unused lubricating oils and additive packages, as shown in Table 1. The pooled limit of quantitation of this test method as obtained by statistical analysis of interlaboratory test results is 0.02% for magnesium, 0.003 % for phosphorus, 0.002 % for sulfur, 0.001 % for chlorine, 0.003 % for calcium, 0.001 % for zinc, and 0.002 % for molybdenum.

1.2 Additive packages require dilution with a contamination free diluent (base oil) prior to analysis. The dilution factor has to be calculated from the expected concentrations to bring the concentrations for all elements into the ranges listed in Table 1.

1.3 Some lubrication oils will contain higher concentrations than the maximum concentrations listed in Table 1. These samples require dilution with a contamination free diluent (base oil) prior to analysis. The dilution factor has to be calculated from the expected concentrations to bring the concentrations for all elements into the ranges listed in Table 1.

1.4 This test method is limited to the use of energy dispersive X-ray fluorescence (EDXRF) spectrometers employing an X-ray tube for excitation in conjunction with the ability to separate the signals of adjacent elements by using a high resolution semiconductor detector.

1.5 This test method uses inter-element correction factors calculated from a fundamental parameters (FP) approach or from another matrix correction method.

1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6.1 The preferred concentration units are mg/kg or mass %.

1.7 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.

TABLE 1 Elements and Range of Applicability

ElementConcentration Range in mass %
Magnesium0.02 to 0.4
Phosphorous0.003 to 0.25
Sulfur0.002 to 1.5
Chlorine0.001 to 0.4
Calcium0.003 to 1.0
Zinc0.001 to 0.25
Molybdenum0.002 to 0.05

Details

ICS-code 75.100
Engelse titel Standard Test Method for Determination of Additive Elements in Lubricating Oils by EDXRF Analysis
Vervangt
Vervangen door

Winkelwagen

Subtotaal:

Ga naar winkelwagen