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DM2400 ISO 20884 ASTM D2622 MEDXRF Light Element Spectrometer
Description:
The DM2400 monochromatic excitation energy dispersive X-ray fluorescence spectrometer for light elements (Si, P, S, Cl), also known as the DM2400 MEDXRF light element spectrometer, is the first monochromatic excitation XRF spectrometer developed by our company based on decades of research experience in X-ray fluorescence spectrometers and on the basis of the company's existing DM series X-ray fluorescence sulfur analyzers, X-ray fluorescence multi-element analyzers, wavelength dispersive X-ray fluorescence multi-channel spectrometers, etc. It adopts the following technologies and devices, making the energy dispersive spectrometer DM2400 with a 50W X-ray tube have excellent reproducibility and stability, ultra-low detection limit, and has already raised the detection level to a new height.
Monochromatic Excitation Energy Dispersive X-ray Fluorescence (MEDXRF) analysis technology
The limit of detection (LOD) of an X-ray fluorescence spectrometer refers to the corresponding quantity of three times the standard deviation of the instrument background signal generated by the matrix blank, that is:
(1)In the formula, Rb represents the background (background) count intensity, N is the count intensity of the low-concentration sample with a known concentration of C, and T is the measurement time. It can be seen from Equation (1) that the detection limit is inversely proportional to the sensitivity (N - Rb) / C and directly proportional to the square root of the background Rb. Under the condition of a fixed measurement time, to reduce the detection limit, it is necessary to increase the sensitivity and/or reduce the background.
One of the main reasons why traditional XRF, whether EDXRF or WDXRF, cannot achieve a lower detection limit is that the continuous bremsstrahlung radiation in the X-ray tube's emitted spectrum causes a high continuous scattering background in the fluorescence spectrum.
Monochromatic Excitation Beam Energy Dispersive X-Ray Fluorescence (MEB-EDXRF) analysis technology uses optical devices to monochromatize the X-ray tube output spectrum, thereby greatly reducing the continuous scattering background of the fluorescence spectrum. At the same time, it minimizes the reduction or even increases the intensity of the monochromatic line or narrow energy band of the required excitation X-rays as much as possible, significantly lowering the detection limit. Compared with traditional EDXRF, it is reduced by 1 to 2 orders of magnitude, and is much lower than that of high-power (such as 4kW) WDXRF.One of the main reasons why traditional XRF, whether EDXRF or WDXRF, cannot achieve a lower detection limit is that the continuous bremsstrahlung radiation in the X-ray tube's emitted spectrum causes a high continuous scattering background in the fluorescence spectrum.
Monochromatic Excitation Beam Energy Dispersive X-Ray Fluorescence (MEB-EDXRF) analysis technology uses optical devices to monochromatize the X-ray tube output spectrum, thereby greatly reducing the continuous scattering background of the fluorescence spectrum. At the same time, it minimizes the reduction or even increases the intensity of the monochromatic line or narrow energy band of the required excitation X-rays as much as possible, significantly lowering the detection limit. Compared with traditional EDXRF, it is reduced by 1 to 2 orders of magnitude, and is much lower than that of high-power (such as 4kW) WDXRF.
According to its surface shape, DCC can be classified into semi-focused (Johann), fully focused (Johansson), and logarithmic spiral (Logarithmic Spiral) types. Among them, semi-focused only partially meets the diffraction conditions, so the characteristic X-ray beam monochromatized by the semi-focused DCC is the worst. Fully focused is fully meeting the diffraction conditions and is point-to-point focused. However, the manufacturing process of fully focused DCC is extremely complex. Besides bending, it must have a process of grinding into an R-shaped surface. Natural crystals such as Si and Ge are very brittle and extremely difficult to grind. Artificial crystals cannot be ground. In addition, natural crystals usually diffract X-rays in a very narrow spectral range. This results in only a part of the target material's characteristic X-rays being diffracted, and the integral diffraction rate is low. The logarithmic spiral rotating hyperboloid artificial lens DM30L adopted by DM2400 is a patented product developed by the company's technical experts through two years of painstaking research. The logarithmic spiral DCC also fully meets the diffraction conditions. Although the focusing is not point-to-point but point-to-plane, since this plane is very small, generally only about 2mm, it can be considered as point-to-point. It uses the DM artificial lens, and the integral diffraction rate of this lens is 3 to 10 times that of the natural crystal. Additionally, it only requires bending without grinding and splicing, making the manufacturing process convenient.
According to its surface shape, DCC can be classified into semi-focused (Johann), fully focused (Johansson), and logarithmic spiral (Logarithmic Spiral) types. Among them, semi-focused only partially meets the diffraction conditions, so the characteristic X-ray beam monochromatized by the semi-focused DCC is the worst. Fully focused is fully meeting the diffraction conditions and is point-to-point focused. However, the manufacturing process of fully focused DCC is extremely complex. Besides bending, it must have a process of grinding into an R-shaped surface. Natural crystals such as Si and Ge are very brittle and extremely difficult to grind. Artificial crystals cannot be ground. In addition, natural crystals usually diffract X-rays in a very narrow spectral range. This results in only a part of the target material's characteristic X-rays being diffracted, and the integral diffraction rate is low.
The logarithmic spiral rotating hyperboloid artificial lens DM30L adopted by DM2400 is a patented product developed by the company's technical experts through two years of painstaking research. The logarithmic spiral DCC also fully meets the diffraction conditions. Although the focusing is not point-to-point but point-to-plane, since this plane is very small, generally only about 2mm, it can be considered as point-to-point. It uses the DM artificial lens, and the integral diffraction rate of this lens is 3 to 10 times that of the natural crystal. Additionally, it only requires bending without grinding and splicing, making the manufacturing process convenient.
Characteristics
Quick and simultaneous - The required measured elements are analyzed simultaneously at high speed, and the content results are usually available within a few tens of seconds.
Low detection limit - Utilizing advanced MEDXRF technology and LSDCC core technology, it achieves the lowest detection limit in the world. It also boasts extremely high reproducibility and accuracy.
Long-term stability - Utilizing variable gain digital multi-channel technology, featuring functions such as automatic PHA adjustment, drift correction, and deviation correction, it exhibits excellent long-term stability.
Environmental protection and energy conservation - Radiation protection meets exemption requirements. During analysis, there is no contact or damage to the samples, no pollution occurs, no chemical reagents are needed, and no combustion is required.
Easy to use - touchscreen operation. Samples can be directly loaded into the sample cup. After placing it in the instrument, simply press the [Start] button and it's all done - truly achieving one-click operation.
High reliability - Integrated design, high degree of integration, strong environmental adaptability, strong anti-interference ability, high reliability.
High cost-effectiveness - No need for gas cylinders, and the operating and maintenance costs are extremely low. The price is half that of similar products from abroad. It is a truly cost-effective product.
Applications
Suitable for oil refineries, testing and certification institutions, oil depots, and laboratories. The measurement range covers various oil products (such as gasoline, diesel, heavy oil, residual fuel oil, etc.), additives, lubricating oils containing additives, and products during the refining and processing process.
It is also applicable to the simultaneous measurement of elements with atomic numbers below Cl in any materials across various industries.
Adopt
Monochromatic excitation energy dispersive X-ray fluorescence (MEDXRF) analysis technique
High diffraction efficiency logarithmic spiral rotating hyperboloid (LSDCC) artificial crystal
SDD detector with high count rate (2 Mcps) and resolution (123 eV)
A micro-focal thin beryllium-window X-ray tube with a reasonable combination of kV, mA and target material
Compliant with standards:
GB/T 11140
ISO20884
ASTM D2622
ASTM D7039
ASTM D7220
ASTM D7757
ASTM D7536
ISO 15597
ASTM D6481
DM2400 ISO 20884 ASTM D2622 MEDXRF Light Element Spectrometer
| Parameter | Specification / Details |
| Measured Elements | Si, P, S, Cl (Optional combinations of elements from B to Cl) |
| X-ray Tube | Voltage: ≤50 keV Current: ≤2 mA Power: ≤50 W Target: Ag (Optional: Mo, Rh, Pd, Cr, etc.) |
| Detector | Type: SDD (Silicon Drift Detector) Effective Area: 20 mm² Resolution: ≥123 eV Count Rate: ≤2 Mcps Window: 8μm Beryllium (Optional: AP3.3) |
| Detection Limit (30s) | Standard Type (1 LSDCC Crystal): Si: 1.2 ppm, P: 0.7 ppm, S: 0.26 ppm, Cl: 0.14 ppm Enhanced Type (3 LSDCC Crystals): Si: 0.7 ppm, P: 0.4 ppm, S: 0.15 ppm, Cl: 0.08 ppm |
| Measurement Range | 3 × Detection Limit to 9.99% |
| Linearity Error | - |
| Analysis Precision | S: Compliant with GB/T 11140, ISO 20884, SH/T 0842, ASTM D2622, D7039, D7220, etc. Si: Compliant with ASTM D7757, SH/T 0706, SH/T 0058, etc. Cl: Compliant with ASTM D7536, ISO 15597, SH/T 0161, etc. P: Compliant with ASTM D6481, SH/T 0296, SH/T 0631, etc. |
| Analysis Time | Range: 1-999 s Recommendation: - Trace measurement: 300 s - Major constituent measurement: 60 s |
| Operating Conditions | Ambient Temperature: 5-40 °C Relative Humidity: ≤85% (at 30 °C), non-condensing Power Supply: 220 V ± 20 V, 50 Hz Power Consumption: ≤200 W |
| Measurement Atmosphere | Self-purging system or Helium purge |
| Dimensions & Weight | Dimensions: 330 mm (W) × 460 mm (D) × 350 mm (H) Weight: 25 kg |
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