Application Solution for Measuring Inorganic Elements in Soil Sediments with RoHS Instruments

Application Plan for ROHS Instruments in Measuring Inorganic Elements in Soil Sediments

Instrument Overview

The WDX4000 Sequential Wavelength Dispersive X-ray Fluorescence Spectrometer is a research achievement of the National Major Scientific Instrument Special Project undertaken by Tianrui Instruments, boasting complete independent intellectual property rights and multiple national patents. The WDX4000 incorporates a large number of innovative and generalized designs, featuring a 40-position automatic sampler, with excellent performance and simple operation.

1) Angle Gauge: Features a patented innovative steel belt transmission system, precise dual-axis design, and provides calibration certificates from metrological departments.

2) High Voltage: Maximum power ≥ 4kW, rapid switching, stable performance, extremely low failure rate.

3) Tube Light: Downward-facing, 4kW, Rh target, paired with a dual-channel tube water-cooling system, significantly extending the service life of the light tube.

3) Filters: 5 sets, optimized configuration of Cu, Al filters and dust-proof filters.

4) Collimators: 3 units, catering to customers' preference for resolution and intensity when measuring trace elements.

5) Crystals: Standard with 5 crystals, capable of qualitative and quantitative analysis for elements between C6-U92, with 3 additional empty slots available for customization.

6) Detectors: Scintillation Detector with a maximum linear counting rate of 3000 kcps, Streamer Detector with a maximum linear counting rate of 1500 kcps, featuring automatic core wire cleaning function.

7) Automatic Sample Loader: 40-axis fully automatic robotic sample loader

8) The latest version of the operating software features theoretical coefficient correction (a), empirical α, β, γ coefficient corrections, FP parameter correction, spectral line overlap correction, instrument status monitoring, and a powerful SQLite-specific database.

9) Our exclusive vacuum airway buffering system effectively protects film samples, widely applied in the field of atmospheric particulate matter detection.

Experimental Principle

Primary X-rays emitted from high-power high-voltage light tubes are directed onto the sample surface after passing through a filter. This excites characteristic X-rays from various elements within the sample. The characteristic X-rays, after being collimated by a single collimator, are parallelly incident on a diffraction crystal. A goniometer then scans to identify characteristic X-rays that meet Bragg diffraction conditions. The X-rays, after passing through a second collimator, enter a detector for signal collection. The final qualitative and quantitative analysis is achieved through computer software processing.