Table 2 Short specifications and protocol references to the tested treatments

Water (negative control)

ultra-purified water, 24 h, RT

–

H₂O₂ Fenton’s (Fe) uncooled ^a

30% H₂O₂ + catalyst (6.67 mg ml^− 1 of Fe(II)SO₄, pH 4), ca. 10 min, max. 85 °C (measured after 5 min)

[2]

H₂O₂ Fenton’s (Fe) cooled ^a

30% H₂O₂ + catalyst (6.67 mg ml^− 1 of Fe(II)SO₄, pH 4), 24 h, 20–30 °C (on ice, measured after 5 min)

[2]

H₂O₂ LT ^a

30% H₂O₂, non-catalysed, 14 days, RT

[31]

H₂O₂ ^b

30% H₂O₂, non-catalysed, 24 h, RT

[31]

KOH + NaClO

per 1 L: 700 ml H₂O, 150 ml NaClO 14% active chlorine and 150 ml saturated KOH (1120 g L^− 1), 5 h, RT

[1]

Pentane (C₅H₁₀)

15 min in an immiscible water - ethanol (pH 3) - pentane mixture (5:1:1), shaken 3 times, 30–35 °C

[31]

SPT

Sodium polytungstate solution 1800 kg m^− 3, acidified with HCl (pH 3), 24 h, RT

[31]

HCl (positive control) ^b

one wafer with PA6, only for image processing algorithm calibration: 10% HCl, 20 min, RT, to fully dissolve MP

–