Table 4.
Comparison of the metal concentration between brand and non-brand samples in the cosmetic products under study.
| Elements | Non-brand samples |
Brand samples |
t-calculated | df | t-tabulated | |||
|---|---|---|---|---|---|---|---|---|
| Mean (μg/g) | SD | Mean (μg/g) | SD | |||||
| Henna | Co | 141.71 | 4.86 | 66.10 | 3.7 | 27.58 | 1.32 | 12.76 |
| Pb | 2.60 | 0.48 | 2.28 | 0.28 | 1.37 | 2.03 | 4.303 | |
| Foundation | Co | 59.33 | 4.84 | 66.35 | 5.41 | −1.99 | 0.80 | 12.76 |
| Pb | 2.79 | 0.86 | 1.79 | 0.19 | 3.26 | 7.83 | 2.36 | |
| Skin-whitening cream | Co | 55.62 | 15.07 | 114.33 | 31.34 | −3.07 | 0.62 | 12.76 |
| Pb | 1.75 | 0.56 | 0.75 | 0.00 | 4.37 | 5.00 | 2.57 | |
| Kajal (kohl) | Co | 39.02 | 4.06 | 21.14 | 3.70 | 6.613 | 1.24 | 12.76 |
| Pb | 7.22 | 3.81 | 1.769 | 0.52 | 3.44 | 5.31 | 2.57 | |