Energy Dispersive X-Ray Fluorescence Spectrometer DW-EDX3000

(for all precious metals in gold jewelry)

Excitation Principle

DW-EDX3000 uses X-ray beam from X-ray tube to irradiate the sample, and the element atoms will be excited and emit the secondary X-ray fluorescence characteristic for its own energy. Then these elements get identified and its content measured. The working principle is as follows:

DW-EDX3000 2

Technical Specifications

Measurement precision 0.05%(≥96%)
Analysis range 1ppm-99.99%
Analytical range of elements More than 60 elements from potassium (K) to uranium (U)
Measuring object powder, solid and liquid
Measurement time (60~300)s
Ambient temperature range (15-30)t)
Relative humidity W70%
Weight 30kg
Working voltage AC 110V/220V
Configuration Single sample chamber
Si PIN semiconductor detector
Amplifier circuit
High and low voltage power supplies
X-ray tube
Non-vacuum chamber
EDX3000-A

Characteristic X-radiation of Element

Each element will emit X-ray at its own energy level when excited. This X-ray is characteristic and called X-ray fluorescence. It is the foundation of analysis.

Scattering

It is the background of the spectrum.

Photoelement

The photoelectron is the foundation of the detector. In the sample, the X-ray intensity of every element is expressed as I1,I2,I3,I4,I5……respectively. The clement content C is the function of X-ray fluorescence intensity I, expressed as follows:

DW-EDX3000 C

This equation is too complicated and can be simplified as:

C=KlI1+KI2+KI3+K4I4+K5I5……

Where

C is the element content in the sample; I1,I2,I3,I4,I5……arc X-ray intensity of element respectively; K1,K2, K3.K4,K5 are coefficients which can be determined by measuring known standard sample to calibrate.

The Spectrum of Recovered Pt

DW-EDX3000 4

Element

Content(%)

Element

Contenl(%)

Cr

0.001

Fe

0.001

Ru

2.011

Ni

0.218

Rh

13.25

Co

0.011

Pd

10.125

Cu

0.207

Ag

0.781

Zn

0.221

Ir

3.104

Au

2.302

Pt

77.816

In

2.011

DW-EDX3000- 5
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