Description of Requirements

DESCRIPTION OF REQUIREMENTS:

Handheld-X-Ray Fluorescence (XRF)

1. Description of Requirements:

The field portable handheld-X-Ray Fluorescence (XRF) spectrometric device is required to measure and determine the presences and elemental concentrations in soils and sediment deposits. Specifically, the XRF device must be able to detect elemental distributions to identify potential rare earth ores, sensitive wasted dredged deposits, and assess the chemical makeup of in-tack and weathered geological materials. The Handheld XRF must also meet the following requirements:
a.
b.
c.
d.

Overall Weight: 3-lbs or less
Overall Dimensions: 195-in3 or less
Minimum X-Ray Excitation: Gold (AU) anode, 55 kV, 100 uA, 5 W X-ray Tube Beam:
i. Spot Size: 4-mm
ii. Type: Fixed Collimated
e. Silicon Drift Detector (SDD):
i. Minimum Active Area Size: 50-mm2
ii. Energy Resolution: 140 eV at 5.95 Mn K-alpha line
iii. Minimum Acquisition Live Time at 250k counts per second (cps): 90% iv. Protective Covering: Required
f. Minimum Detectable and Installed Elemental Standards for (See Table 1.): i. Alkali Metals: Cesium (Cs), Lithium (Li), Potassium (K), Rubidium (Rb) ii. Alkaline Earth Metals: Barium (Ba), Calcium (Ca), Magnesium (Mg) iii. Metalloids: Antimony (Sb), Silicon (Si), Strontium (Sr) iv. Post Transition Metals: Aluminum (Al), Arsenic (AS), Bismuth (Bi), Cadmium (Cd), Mercury (Hg), Lead (Pb), Tin (Sn), Zinc (Zn) v. Transition Metals: Chromium (Cr), Cobalt (Co), Copper (Cu), Iron (FE), Manganese (Mn), Molybdenum (Mo), Nickel (Ni), Niobium (Nb), Silver (Ag),Tantalum (Ta), Titanium (Ti), Tungsten (W), Yttrium (Y), Vanadium (V), Zirconium (Zr)
vi. Lanthanides: Cerium (Ce), Europium (Eu), Gadolinium (Gd), Lanthanum (La), Neodymium (Nd) ,Praseodymium (Pr), Samarium (Sm)
vii. Reactive Non-Metals: Phosphorus (P), Selenium (Se) Sulfur (S) viii. Additional Library Standards: Option to Add as Needed g. Calibration:
i. Standards Included: Yes
ii. External Calibration Reference Material: Stainless Steel with Grade 316 iii. Calibration Method: Auto-Calibrates and Checks Calibration on 316 Grade Stainless Steel Reference Material

Table 1: Periodic Table - Elements, Definition, Groups, Periods, Blocks. (Obtained from: https://www.priyamstudycentre.com/chemistry/periodic-table-elements) h. Multi-Integrated Cameras
i. Micro/Macro
ii. Targeting Crosshairs
iii. Barcode Scannable
iv. QR Code Scannale
i. Screen:
i. Flat/Flush non-flipping
ii. Touch Screen