Table 1.

Recovery rates of 5 MP standards in ultra-pure water and liquid cow milk (brand B, whole milk 2, 3.5% fat).

Spiked samplesa	PMMA (%)	PS (%)	PP (%)	PE (%)	PA (%)
Ultra-pure water (N = 7) without digestion	78 ± 12	97 ± 13	90 ± 18	86 ± 19	94 ± 24
Liquid cow’s whole milk 2 (brand B, 3.5% fat) (N = 4) with digestion	97 ± 17	123 ± 45	136 ± 34	119 ± 30	141 ± 12

^aAfter blank subtraction of PP, PE and PS contaminations.

N represents the number of replicates.