EDXRF与ICP的困惑

EDXRF与ICP的困惑

Recently one company's CEO asked me that what should his company on earth to do with RoHS, per his requirement, I made one simple but complete presentation to him.
Here I show the paper for my reader' reference.

One perfect and complete analysis project:
Methods Cd Pb Cr Hg PBB PBDE

1XRF Screening each element’ total content in sample,including Cd,Cr,Pb,Hg and Br
2Pretreatment Hotplate,microwave,EN1122 method B,USEPA method EPA3050,3052 / /
3ICP Analysis with perfect precision, Hg needing hydride system parts / /
4UV Analysis Cr(VI) hexavalent chromium /
5FTIR / / / / Qualitatively,semi quantitatively
6Sohlext extract / / / Extract PBB and PBDE from polymer samples
7GCMS / / / /USEPA1614, 8270,analysis quantitatively
8AccessoriesFurniture in Lab, pure water system,glassware, chemical reagents and others
9Training Background of substances, pretreatment methods and standards,operate skills and experience to control data quality
How to facing RoHS: we are puzzled!
One say:EDXRF is all and enough!
One say:EDXRF is limited!
One say:ICP is necessary!
ICP or EDXRF should I choose on earth?
What is ICP?Inductively coupled Plasma-Optical emission spectrometer
And what is EDXRF?Energy- Dispersive X-Ray Fluorescence Spectrometer
EDXRF VS ICP:
ICP EDXRF
Preparation： Mechanical and chemica mechanical
Speed： 2mins or so 100seconds or so
Sampling： Liquid mode No dust and polluted
Composition： Torch, Nebulizer, Pump, RF, optical spectrometer, CID；computer Xray tube, filter wheel,ECD and computer
Precision ： Perfect, less
Cost： 1 million RMB invest, consume 20kRMB 1 million RMB invest, consume 2kRMB
Advisable conclusion：legal arbitrage tool with accuracy and precision Just screening for reference
What is on earth our advice for RoHS?
Choose the “best “: most suitable , not the cheapest or most expensive!

EDXRF:screening total Cd, Pb,Cr,Hg,Br content in sample；

ICP:analysis Cd,Pb,Cr,Hg total content exactly;

UV:let you know hexa-valent Cr or tri-valent Cr;

GCMS:analysis PBB and PBDE

Microwave:quick and high efficiency pretreatment for Cd,Pb,Cr,Hg,PBB,PBDE quantitive analysis