Mg, Ca, S, P, Zn determination in lubrication oil and additives

The test method specifies Mg, Ca, S, P, Zn determination in oils and additives with X-ray fluorescence method with "SPECTROSCAN MAKC" spectrometers.
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The test method is based on x-ray fluorescence radiation intensity measurement on the wavelengths corresponding to the determined elements ones and calculation of the elements concentration with the preliminary prepared calibration curve. 20 cm3 of the test material is required for analysis (two sequential measurements) including reserve amount. Viscous products shall be liquefied either by heating or by dilution with mineral oil.
The test material is filled in the sample cups and put in spectrometer. Analysis is carried out automatically according to the program, lead content calculation is run with preliminary obtained calibration curve. If the sample was diluted then the result is multiplied by the corresponding coefficient.
The test method provides determination of a single element or multiple elements content at a time dependent on the analysis goal.
The concentration range of the elements determined according this test methods are given in the table.

ElementConcentration range, mass %
Ca
from 0.10 up to 1.0
over 1.0 up to 10
Zn
from 0.010 up to 0.20
from 0.20 up to 1.0
over 1.0 up to 10
Mgfrom 0.10 up to 2.0
S
from 0.10 up to 5
over 5 up to 15
P
from 0.01 up to 0.20
from 0.20 up to 1.0
over 1.0 up to 10

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