Table 2.

Type, size, and shape of microplastics in human blood detected using µ-FTIR.

Classification		Detected samples	Microplastic counts (N/ml)
		N (%)	Mean	Min	25th	Median	75th	Max
Total		32 (88.9)	4.2	0	1	3	4	26
Type	PP	18 (50.0)	1.4	0	0	0	2	17
	PE	14 (38.9)	0.7	0	0	0	1	4
	PET	6 (16.7)	0.3	0	0	0	0	4
	PS	21 (58.3)	1.7	0	0	1	2	22
	PA	3 (8.3)	0.1	0	0	0	0	1
Size	5–10 μm	1 (2.8)	0.03	0	0	0	0	1
	10–20 μm	6 (16.7)	0.2	0	0	0	0	2
	20–50 μm	27 (75.0)	2.8	0	1	2	3	21
	50–100 μm	19 (52.8)	0.9	0	0	1	1	5
	≥ 100 μm	7 (19.4)	0.3	0	0	0	0	3
Shape	Fragment	31 (86.1)	3.6	0	1	2	3	24
	Fiber	13 (36.1)	0.7	0	0	0	1	4

PP polypropylene, PE polyethylene, PET polyethylene terephthalate, PS polystyrene, PA polyamide.