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The concentration of lead, in the 34 samples of ‘Surma’ collected from local market
| Colour of ‘Surma’ | No. of samples | Lead concentration (%) |
|---|---|---|
| Black | 7 | 31.63 ± 9.16 |
| Brown | 5 | 29.51 ± 7.51 |
| Orange | 9 | 32.13 ± 10.82 |
| Grey | 7 | 24.69 ± 6.76 |
| White | 6 | 0.64 ± 0.03 |
Values represent mean ± SD
