Chlorine salts determination in oil


Chlorine salts determination in oil

Chlorine salts content is one of the most important features of commodity oil quality, which influences its price together with other properties. There are several groups of oil differing in chlorine salts content treatment. Chlorine salts content are specified for each group and export quality requirements are especially distinguished.
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The upper limit for chlorine salts specified for petroleum is 900 mg/l, the lower limit is not specified, but usually is about several mg/l.

This concentration range is easily covered with X-ray fluorescence method, which is much easier and convenient than prescribed standard methods.

There are two ways of chlorine salts content determination by XRFA: direct one from petroleum and determination of chlorine salts in water extract. In the first case to make the salts distribution uniform the sample material is ultrasonically treated; in the second case extraction is made. The prepared sample material is filled in a sample cup and analyzed in spectrometer.

XRFA is registration of the secondary fluoresce of chlorine atoms exited by x-ray tube radiation. The value of the registered signal is proportional to the chlorine atoms content in the sample. Chlorine content is calculated with preliminary obtained calibration curve. Mass content of Chlorine salts is calculated for NaCl.

:SPECTROSCAN МАКС-GF1(2)E" is a modification of WDXRF  "SPECTROSCAN МАКС-G" spectrometer with one or two additional EDXRF channels.

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