Table 1.
Detectable efficiency and the found values of heavy metals in environmental samples using the DEP-On-Go system against quality guidelines from several environmental protection organizations.
| Limit of Detection | Drinking Water | Air Dust | Soil | ||||
|---|---|---|---|---|---|---|---|
| PEL a | Sample d | PEL b | Sample e | PEL c | Sample f | ||
| (μg·L−1) | (μg·L−1) | (μg∙m−3) | (μg∙g−1) | (μg∙g−1) | |||
| Cd | 2.6 | 3 | 1.73 | 5 | 0.22 | 85 | 0.016 |
| Pb | 4.0 | 10 | 6.5 | 50 | 27.4 | 420 | 0.24 |
| As | 5.0 | 10 | 2.3 | 10 | 0.034 | 75 | 0.025 |
| Hg | 1.5 | 6 | 4.1 * | 25 | 27.2 * | 840 | 0.045 * |
| Cu | 15.5 | 2000 | 14.7 | 1000 | 8.14 | 4300 | 0.175 |
| Zn | 14.4 | 3000 | 1240 | 10,000 | 75.6 | 7500 | 1.4 |
a WHO (World Health Organization) [25]; b OSHA (Occupational Safety and Health Administration of United States, Department of Labor) [26]; c US-EPA (United States Environmental Protection Agency) [27]; d Drinking groundwater sample from central Jaipur city, India; e Room dust from an educational campus in central Jaipur city, India; f Soil from a garden area in Nomi city, Japan; * combined values of mercury with iron. PEL: Permissible Exposure Limit.