Table 6 Sample materials with initial weight, digestion additives and LOQ

Water

–

–

0.001 mg/L

Oil

0.5 g

HNO₃, H₂O₂, H₂O

0.1 mg/kg

Citric acid

2.5 mL

HNO₃, H₂O₂, H₂O

0.02 mg/L

ICP-MS 3 mg/L ICP-OES

Tea bag and granulated Tea^a (instant lemon-tea drink)

5 mL

HNO₃, H₂O₂

0.005 mg/L

Lemon juice

1 mL

HNO₃, H₂O₂, H₂O

0.025 mg/L

Apple juice with mineral water

5 mL

HNO₃, H₂O₂

0.005 mg/L

Meat filled pasta (ravioli)

1 g

HNO₃, H₂O₂, H₂O

0.025 mg/kg

Fish

1 g

HNO₃, H₂O₂, H₂O

0.025 mg/kg

Espresso

5 mL

HNO₃, H₂O₂

0.005 mg/L

Ground coffee

0.5 g

HNO₃, H₂O₂, H₂O

0.5 mg/kg