Table V

Extracted Elemental Impurities Reported for Polycarbonate (PC)

Element	Concentration (mg/kg unless noted)	Extraction Details		Comments	Ref.
Element	Concentration (mg/kg unless noted)	Solvent	Conditions	Comments	Ref.
Al	NR^¹	Low pH (≈3)	Sealed vessel, 55 °C for 4 days, 0.1–0.3 g sample/mL solvent	6 materials tested; resins and parts^³	12
	NR–0.50	High pH (≈9)
	NR	Ethanol/water
B	NR–0.40	Low pH (≈3)	Sealed vessel, 55 °C for 4 days, 0.1–0.3 g sample/mL solvent	6 materials tested; resins and parts^³	12
	NR–0.50	High pH (≈9)
	NR–0.80	Ethanol/water
	0.4 ng/mL	Water	Dynamic extraction with recirculation, ambient temperature, 24 h	Intact part (connector)	18
	<0.1 ng/mL	Ethanol		Intact part (connector)	18
Br	1.1	pH 2.5	Sealed vessel, 121 °C for 1 h, 0.025 g sample/mL solvent	Molded part^⁴	35
Br	0.07	pH 9.5	Sealed vessel, 121 °C for 1 h, 0.025 g sample/mL solvent	Molded part^⁴	35
Ca	NR–0.15	Low pH (≈3)	Sealed vessel, 55 °C for 4 days, 0.1–0.3 g sample/mL solvent	6 materials tested; resins and parts^³	12
	NR–0.78	High pH (≈9)
	NR–0.03	Ethanol/water
	<0.1 ng/mL	Water	Dynamic extraction with recirculation, ambient temperature, 24 h	Intact part (connector)	18
	1 ng/mL	Ethanol		Intact part (connector)	18
	6.6	pH 2.5	Sealed vessel, 121 °C for 1 h, 0.025 g sample/mL solvent	Molded part^⁴	35
	0.8	pH 9.5	Sealed vessel, 121 °C for 1 h, 0.025 g sample/mL solvent	Molded part^⁴	35
Cr	0.07	pH 2.5	Sealed vessel, 121 °C for 1 h, 0.025 g sample/mL solvent	Molded part^⁴	35
Cr	0.02	pH 9.5	Sealed vessel, 121 °C for 1 h, 0.025 g sample/mL solvent	Molded part^⁴	35
Fe	NR–0.14	Low pH (≈3)	Sealed vessel, 55 °C for 4 days, 0.1–0.3 g sample/mL solvent	6 materials tested; resins and parts^³	12
	NR	High pH (≈9)		6 materials tested; resins and parts^³	12
	NR	Ethanol/water	Sealed vessel, 121 °C for 1 h, 0.025 g sample/mL solvent	Molded part^⁴	35
	0.71	pH 2.5
	0.06	pH 9.5
Mg	NR	Low pH (≈3)	Sealed vessel, 55 °C for 4 days, 0.1–0.3 g sample/mL solvent	6 materials tested; resins and parts^³	12
	NR	High pH (≈9)		6 materials tested; resins and parts^³	12
	NR	Ethanol/water	Sealed vessel, 121 °C for 1 h, 0.025 g sample/mL solvent	Molded part^⁴	35
	0.24	pH 2.5
	0.17	pH 9.5
Na	NR–0.30	Low pH (≈3)	Sealed vessel, 55 °C for 4 days, 0.1–0.3 g sample/mL solvent	6 materials tested; resins and parts^³	12
	NA^²	High pH (≈9)		6 materials tested; resins and parts^³	12
	NR–0.58	Ethanol/water	Dynamic extraction with recirculation, ambient temperature, 24 h	Intact part (connector)	18
	0.2 ng/mL	Water	Sealed vessel, 121 °C for 1 h, 0.025 g sample/mL solvent	Molded part^⁴	35
	<0.1 ng/mL	Ethanol
	1.0	pH 2.5
P	NR	Low pH (≈3)	Sealed vessel, 55 °C for 4 days, 0.1–0.3 g sample/mL solvent	6 materials tested; resins and parts^³	12
	NA	High pH (≈9)
	NR	Ethanol/water
S	NR–0.48	Low pH (≈3)	Sealed vessel, 55 °C for 4 days, 0.1–0.3 g sample/mL solvent	6 materials tested, resins and parts^³	12
	NR–0.48	High pH (≈9)
	NR	Ethanol/water
Si	NR–51	Low pH (≈3)	Sealed vessel, 55 °C for 4 days, 0.1–0.3 g sample/mL solvent	6 materials tested; resins and parts^³	12
	NR–50	High pH (≈9)
	NR–57	Ethanol/water
Zn	NR	Low pH (≈3)	Sealed vessel, 55 °C for 4 days, 0.1–0.3 g sample/mL solvent	6 materials tested; resins and parts^³	12
	NR	High pH (≈9)		6 materials tested; resins and parts^³	12
	NR	Ethanol/water	Dynamic extraction with recirculation, ambient temperature, 24 h	Intact part (connector)	18
	0.5 ng/mL	Water		Intact part (connector)	18
	<0.1 ng/mL	Ethanol	Sealed vessel, 121 °C for 1 h, 0.025 g sample/mL solvent	Molded part^⁴	35
	0.12	pH 2.5
	0.03	pH 9.5

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, Ba, As, Be, Bi, Cd, Co, Cr, Cu, Ge, Li, Mn, Mo, Ni, Pb, Sb, Se, Sn, Sr, Ti, V, and Zr.
↵4 Elements that were not extracted in reportable levels (<0.01 μg/g) included Al, As. Co, Cu, K, Mo, Ni, Pb, Si, Sb, Sr, Ti, and V.