ESi WDXRF 1630 Oil Analysis Equipment

Instrument

Theory: Monochromatic wavelength dispersive X-ray fluorescence spectroscopy (WDXRF)

Application: Analyzing sulfur content in fuel down to 0.2 ppm LOD, compliant with ASTM D7039, ASTM D2622, ISO 20884, SH/T 0842

X-ray Source

Micro-focus X-ray tube (focus spot 175 µm, target Cr, Be window 100 µm)

Optics

Johansson-type DCC for monochromatic excitation and characteristic X-ray detection

Vacuum chamber XFS (X-ray Fixed System)

Detection

Sealed proportional counter (25.4 µm Be window)

Digital shaping, high-speed multi-channel pulse height analyzer

Software

High-speed processor or embedded system platform

Touch-pad with graphical user interface

Functions include calibration, drift correction, routine testing, data browsing, data printing, statistical analysis and data transfer

Environmental Requirement

Room temperature: 15–30°C

Relative humidity <80%

Parameters

LOD: 0.2 ppm at 300 s

Range: 0.2 ppm–10%

Measuring time: 30–300 s

Standard error: Sn-1 <0.2 ppm (2 ppm), 0.4 ppm (10 ppm), 2.5 ppm (50 ppm)

Power Requirement

AC 220–240 V, 5A

Rated power: 500 W

Johansson-Type DCC

Monochromatic WDXRF using double curved crystal optics has the advantage of very high sensitivity for a specific sample element of interest.

The primary Johannson-Type DCC focusing optic captures a narrow bandwidth of X rays from the source and focuses this intense monochromatic beam to a small spot on the sample. The monochromatic primary beam excites the sample and secondary characteristic fluorescence X-rays are emitted.

The second Johannson-Type DCC collects only select characteristic X-ray wavelengths of interest within a narrow bandwidth

XFS (X-Ray Fixed System)

The optics system is carefully adjusted in the factory with special facilities and locked tightly on its proper position.

High precision optics

All core optic units were manufactured with CMC facilities. No moving parts and no slit switching optics in the whole instrument, to ensure the long term reliability.

High Integration

Digital Multi-Channel Analyzer

High precision digital pulse shaping and digital pulse height analyzer based on FPGA; implement fast baseline restoration and best peak detection function