Table II

Extracted Elemental Impurities Reported for Acrylonitrile-Butadiene-Styrene (ABS) Copolymer

ElementConcentration (mg/kg unless noted)Extraction DetailsCommentsRef.
SolventConditions
AlNR1–0.65Low pH (≈3)Sealed vessel, 55 °C for 4 days, 0.04–0.1 g sample/mL solvent6 materials tested; resins and parts312
NRHigh pH (≈9)
NR–0.18Ethanol/water
BNR–0.19Low pH (≈3)
NRHigh pH (≈9)
NR–0.68Ethanol/water
CaNR–0.60Low pH (≈3)
NR–0.56High pH (≈9)
NR–0.21Ethanol/water
CrNRLow pH (≈3)
NR–4.3High pH (≈9)
NREthanol/water
FeNR–0.50Low pH (≈3)
NRHigh pH (≈9)
NREthanol/water
MgNR–1.3Low pH (≈3)
NR–0.50High pH (≈9)
NR–1.5Ethanol/water
NaNR–2.0Low pH (≈3)
NA2High pH (≈9)
NR–2.0Ethanol/water
PNR–0.63Low pH (≈3)
NAHigh pH (≈9)
NREthanol/water
SNRLow pH (≈3)
NR–3.6High pH (≈9)
NR–0.82Ethanol/water
SiNR–1.5Low pH (≈3)
NR–2.0High pH (≈9)
NR–0.90Ethanol/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 Low levels of Cu, Cr, and Mn were reported for one of the materials tested. Elements that were not extracted in reportable levels included Ag, As, Ba, Be, Bi, Cd, Co, Ge, Li, Mo, Ni, Pb, Sb, Se, Sn, Sr, Ti, V Zn, and Zr.