SPECTROSCAN SW-D3

Wavelength dispersive X-ray fluorescent WDXRF analyzer for sulfur determination in automobile fuel  as well as in petroleum and petroleum products.
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“SPECTROSCAN SW-D3“ wavelength  dispersive X-ray fluorescent WDXRF analyzer of sulfur in petroleum and petroleum products is used for determination of low sulfur weight content in automobile fuel,   petroleum and petroleum products such as diesel fuel, gasoline, kerosene, lubrication oil, crude oil, hydraulic oil, etc.  at refinery factories, in research laboratories of oil Industry, oil-transport companies, as well as in mobile laboratories meeting requirements of EN ISO 20884, ASTM D2622, ASTM D6334.
Routine work with the Analyzer does not require high skills of the staff and can be fulfilled by a laboratory assistant with no control from analysts.
"SPECTROSCAN SW-D3" is a desk top with inbuilt computer and printer. It consists of two blocks: Spectrometer and vacuum pump. The spectrometer has a closed cycle water cooling system. The measuring tract is in vacuum chamber, but the sample is at the ambient conditions.

Analytical parameters
Determined element
S (sulfur)
Limit of detection for 200 s
0,5 mg/kg
Detection range of Sulfur mg/kgот 2,0 up 50000
Limit of accepteble absolute accuracy, mg/kg&plusm;(0,04·X+1,1)
Where X - mass fraction of Sulfur, mg/kg
Repetability limit* of the results of single measurements (P=0,95),mg/kg, in detection range, mg/kb:
- from 2 to 60 including
-> 60 to 500 including
-> 500 to 50000
*module of difference between two sequential measurements of the mass fraction of sulfur in two samples of a single sample.


0.045·X+0,3
4,0
0,017·X-4.5
where X - mass fraction of Sulfur, mg/kg
Sulfur concentration range
from 0 mg/kg to 5,0%
Type of sulfur line detection
Crystal diffraction
Crystal analyzer
С(002) – pyrolitic carbon
X-ray tube anode
Cr or Pd
Time for sample measurement
from 8 minutes

Technical specification
Sample changer
Automatic lateral loading for 3 sample cups
Sample cups, diameter, volume

∅32 mm, V 8 cm3

∅32 mm, V 8 cm3, ventilated
X-ray tube capacity
less 200 W
Interface
display, thermo printer
Dimensions and weight (not more)
530х480х340 mm, 40 kg– spectrometer
330х230х380 mm, 9 kg – vacuumpump
Power supply
220 V, ~ 50 Hz, 750 W
Due to the original design no He blowdown is required, providing LLD of 1 ppm
  • Simple in operation;
  • Desk top instrument;
  • The sample data and analysis results are shown in display and printed out by inbuilt printer;
  • Special ventilated cups are developed for volatile petroleum products;
  • 3-position sample automatic changer makes analysis of sample replicateseasy.
Due to lateral position of the sample:
  • Error due to water and air bulbs in petroleum products are excluded;
  • Contamination with petroleum products of the inner parts of the analyzer is excluded;
  • Additional errors due to contamination of the additional protection film is excluded; 
  • Sample loading unit is easily cleaned.
Minimum operator actions:
  • Put in the number or name of the sample from inbuilt key-board;
  • Fill in two sample cups with the sample;
  • Put in the samples into the analyzer and start measurements.
All the rest operations are run automatically.
The analyzer was developed for sulfur determination and meets requirements of

1. ISO 20884:2004 Petroleum products -- Determination of sulfur content of automotive fuels -- Wavelength-dispersive X-ray fluorescence spectrometry


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