Page 18 - EDX-7200

Comprehensive Applications

New
ʔScreening Analysis of Phosphorusʔ
Phenol and isopropyl phosphoric acid (3:1) (PIP (3:1)) are widely used in products such as polyvinyl chloride (PVC) and polyurethane to provide
plasticity and flame retardancy. Meanwhile, the U.S. Environmental Protection Agency (U.S. EPA) has begun to regulate the manufacture,
processing and commerce of products and articles containing PIP (3:1) under the Toxic Substances Control Act (TSCA).
For this regulation, EDX is capable of screening and analyzing the content of PIP (3:1), a phosphorus compound, at phosphorus concentrations.
With the use of an optional vacuum measurement unit, analysis can be performed with even higher sensitivity.

PIP (3:1) Structural Formula

[cps/uA] Na-Sc [cps/uA] Na-Sc
Actual sample containing PIP (3:1) ClKa– Vacuum
Imitative sample containing PIP (3:1) Air –P Ka ClKa–
Blank
–P Ka

P concentration:
approx. 1000 ppm –S Ka –S Ka

1.5 2.0 2.5 1.5 2.0 2.5
[keV] [keV]
Pro le Superposition of Sample Containing PIP (3:1) and Blank Pro le Superposition of Vacuum and Atmosphere Measurements
of Actual samples Containing PIP
*The imitative sample containing PIP (3:1) is prepared by adding PIP (3:1)
to petroleum ether so that the concentration of phosphorus (P) is
1000 ppm. In addition, PVC is assumed as the material and
chlorinated paraffin is added to mix chlorine (Cl).

EDX-7200
18 Energy Dispersive X-Ray Fluorescence Spectrometer