Table XIII

Extracted Elemental Impurities Reported for Thermoplastic Elastomers (TEs)

ElementConcentration (mg/kg unless noted)Extraction DetailsCommentsRef.
SolventConditions
BNR1Low pH (≈3)Sealed vessel, 55 °C for 4 days, 0.02–0.10 g sample/mL solvent6 materials tested; resins, parts312
NRHigh pH (≈9)
NR–0.25Ethanol/water
CaNR–0.80Low pH (≈3)
NR–0.60High pH (≈9)
NR–0.50Ethanol/water
NaNR–0.80Low pH (≈3)
NA2High pH (≈9)
NR–9.2Ethanol/water
PNRLow pH (≈3)
NAHigh pH (≈9)
NR–11Ethanol/water
SNRLow pH (≈3)
NR–0.60High pH (≈9)
NR–6.8Ethanol/water
SiNR–1.4Low pH (≈3)
NR–1.0High pH (≈9)
NR–11Ethanol/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, Mg, Mn, Mo, Ni, Pb, Sb, Se, Sn, Sr, Ti, V, Zn, and Zr.