Table VII

Extracted Elemental Impurities Reported for Polyethersulfone (PES)

ElementConcentration (mg/kg unless noted)Extraction DetailsCommentsRef.
SolventConditions
BNR1–0.19Low pH (≈3)Sealed vessel, 55 °C for 4 days, 0.1–0.2 g sample/mL solvent3 materials tested; resins and parts312
NRHigh pH (≈9)
NR–0.98Ethanol/water
CaNR–9.6Low pH (≈3)
NR–0.91High pH (≈9)
NR–2.8Ethanol/water
MgNR–0.70Low pH (≈3)
NR–0.50High pH (≈9)
NR–0.20Ethanol/water
NaNR–0.87Low pH (≈3)
NA2High pH (≈9)
NR–5.7Ethanol/water
PNR–1.6Low pH (≈3)
NAHigh pH (≈9)
NR–0.20Ethanol/water
SNR–1.3Low pH (≈3)
NR–1.1High pH (≈9)
NR–6.7Ethanol/water
SiNR–0.20Low pH (≈3)
NR–0.77High pH (≈9)
0.10–0.98Ethanol/water
ZnNR–1.2Low pH (≈3)
NRHigh pH (≈9)
NREthanol/water

  • Notes:

  • ↵1 NR = Not reported: not extracted at reportable levels (generally less than 0.01 μg/g).

  • ↵2 NA = Not applicable; element was a component of the extracting solvent.

  • ↵3 Elements that were not extracted in reportable levels included Ag, Al, As, Ba, Be, Bi, Cd, Co, Cr, Cu, Fe, Ge, Li, Mn, Mo, Ni, Pb, Sb, Se, Sn, Sr, Ti, V, and Zr.