NEX DE VS—RoHS PE-Pak Rapid Screening by XRF
Scope
The polyethylene PE-Pak is demonstrated for RoHS Rapid Screening by XRF.
Background
The Restriction on Hazardous Substances initiative (RoHS) limits the allowable amounts of the toxic elements chromium, mercury, lead, bromine, and cadmium in plastics and consumer goods. Energy Dispersive X-ray Fluorescence (EDXRF) is an accepted analysis technique for the rapid screening by XRF and quantification of the hazardous element according to RoHS norms. To meet the industry needs, Rigaku offers the NEX DE VS analyzer with automatic collimators and a camera for sample positioning and sample image, giving QA/QC technicians the means for fast and simple screening and analysis of materials that must conform to RoHS and similar directives.
Model: NEX DE VS
RoHS PE-Pak method: Fundamental Parameters (FP) Matching Library
- FP for flexibility in measuring diverse PE samples
- Factory Matching Library for Cr, Hg, Pb, Br, Cd, using CRMs
- Flexible Rigaku Matching Library software makes it easy for users to customize the Matching Library or create new Matching Libraries
- Software includes empirical calibration capability
PE-Pak results: CRM check standard
The PE-Pak comes with one CRM check standard with certified assays for Cr, Hg, Pb, Br, and Cd. Measurement results of the CRM check standards are shown here using the PE-Pak method with Matching Library.
10 mm spot size applicable to NEX DE using autosampler tray for bulk analysis and NEX DE VS using single position Point Analysis.
| PE CRM Check Standard Units: ppm |
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| 10 mm collimator | Cr | Hg | Pb | Br | Cd |
| Certified assay | 500 ± 20 | 499 ± 20 | 500 ± 20 | 250 ± 20 | 50 ± 20 |
| NEX DE VS result | 504 | 505 | 494 | 248 | 51 |
3 mm and 1 mm spot sizes applicable NEX DE VS using single position Point Analysis.
| PE CRM Check Standard Units: ppm |
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| 3 mm collimator | Cr | Hg | Pb | Br | Cd |
| Certified assay | 500 ± 20 | 499 ± 20 | 500 ± 20 | 250 ± 20 | 50 ± 20 |
| NEX DE VS result | 504 | 500 | 491 | 254 | 49 |
| PE CRM Check Standard Units: ppm |
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| 1 mm collimator | Cr | Hg | Pb | Br | Cd |
| Certified assay | 500 ± 20 | 499 ± 20 | 500 ± 20 | 250 ± 20 | 50 ± 20 |
| NEX DE VS result | 534 | 485 | 495 | 259 | 51 |
Certified assay standard deviation (2-sigma) = 4% relative
User-defined RoHS Limits
The PE-Pak comes with the default RoHS Pass/Unsure/Fail judgment settings. NEX DE software allows the user to easily adjust and enter different limits as desired.
User-definable RoHS report fields
The flexible Rigaku software allows users to design RoHS report field headers to suit specific reporting needs. Headers to report Sample Name and Analyzed By are automatically set by default and users simply enter up to six additional report memo headers as desired.
Point analysis screen — NEX DE VS
Operator simply selects method, enters sample name and report fields, then presses Start.
RoHS report
A RoHS report is automatically generated that includes the user defined fields, sample image, and element judgment.
Conclusion
The NEX DE VS with automatic collimators and camera provides excellent sensitivity and reliable precision for RoHS rapid screening by XRF down to 1 mm spot size. Simple Point Analysis Screen allows operators to easily enter report information as designed using customizable report headers and automatically generates an RoHS report complete with sample image, analysis results, and Pass/Unsure/Fail judgment.
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