Table 2 Number and type of microplastics per millilitre identified via laser direct infrared imaging system with spectroscopy.
From: Microplastics identified in commercial over-the-counter lubricant eyedrops
Sample | Polyethylene (PE) | Polypropylene (PP) | Polystyrene (PS) | Polyvinylchloride (PVC) | Polyethylene Terephthalate (PET) | Polycarbonate (PC) | Polymethylmethacrylate (PMMA) | Polyamide (PA) | Polyurethane (PU) | Total | Mean number of microplastic particles (standard deviation) |
|---|---|---|---|---|---|---|---|---|---|---|---|
A-Slide 1 | 43 | 15 | 3 | 0 | 8 | 0 | 75 | 78 | 88 | 308 | 141 ± 153 |
A-Slide 2 | 1 | 1 | 0 | 0 | 3 | 3 | 0 | 0 | 0 | 8 | |
A-Filter | 15 | 0 | 0 | 6 | 75 | 0 | 0 | 5 | 8 | 108 | |
B-Slide 1 | 3 | 8 | 0 | 3 | 3 | 0 | 38 | 179 | 45 | 276 | 101 ± 151 |
B-Slide 2 | 3 | 28 | 0 | 0 | 3 | 0 | 13 | 30 | 13 | 88 | |
B-Filter | 28 | 3 | 0 | 0 | 106 | 0 | 0 | 15 | 53 | 203 | |
C-Slide 1 | 41 | 41 | 3 | 8 | 28 | 6 | 93 | 0 | 26 | 241 | 106 ± 122 |
C-Slide 2 | 0 | 0 | 0 | 3 | 3 | 0 | 0 | 0 | 0 | 5 | |
C-Filter | 5 | 0 | 0 | 5 | 31 | 0 | 5 | 8 | 18 | 71 | |
D-Slide 1 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 8 | 35 ± 24 |
D-Slide 2 | 0 | 0 | 0 | 0 | 5 | 3 | 0 | 45 | 3 | 55 | |
D-Filter | 5 | 0 | 3 | 0 | 21 | 0 | 0 | 3 | 10 | 41 | |
E-Slide 1 | 0 | 6 | 0 | 0 | 4 | 0 | 53 | 10 | 43 | 115 | 82 ± 49 |
E-Slide 2 | 1 | 0 | 0 | 0 | 10 | 0 | 0 | 14 | 1 | 26 | |
E-Filter | 59 | 1 | 0 | 3 | 7 | 0 | 3 | 10 | 23 | 106 | |
F-Slide 1 | 0 | 5 | 3 | 0 | 0 | 0 | 48 | 3 | 36 | 93 | 94 ± 47 |
F-Slide 2 | 0 | 18 | 0 | 0 | 3 | 0 | 15 | 0 | 13 | 48 | |
F-Filter | 46 | 8 | 0 | 0 | 60 | 3 | 0 | 3 | 23 | 141 |
