The Scientific World Journal / 2018 / Article / Tab 4

Research Article

Sequential Extractions and Toxicity Potential of Trace Metals Absorbed into Airborne Particles in an Urban Atmosphere of Southwestern Nigeria

Table 4

The results of analysis of certified and found results for BCR 701 (µgg−1).

µgg−1PbCrCuZnNiCdMn

Step
Certified166.9 ± 8.2287.26 ± 28.439.6 ± 3.222.6 ± 0.126.11 ± 0.2219.6 ± 2.0712.5 ± .22
Found165.2 ± 3.9103 ± 10.0932.2 ± 3.92.2 ± 0.96.09 ± 0.0819.2 ± 3.003.2 ± 3.9

Step
Certified108.6 ± 8.22146.9 ± 22.3027.83 ± 4.3431.0 ± 5.04.58 ± 0.4610.09 ± 1.48.25 ± 4.3
Found110.34 ± 9.2126.6 ± 10.6829.86 ± 5.5329.0 ± 7.8<4.529.11 ± 0.904.2 ± 8.60

Step
Certified97.13 ± 8.1079.88 ± 5.714.18 ± 3.76119.7 ± 11.23.29 ± 0.746.90 ± 0.894.5 ± 10.2
Found68.8 ± 9.9074.29 ± 7.1<13.11117.0 ± 10.03.56 ± 0.916.59 ± 0.70<3.2

Step
Certified102.49 ± 8.264.8 ± 8.2315.46 ± 5.9956.08 ± 8.014.05 ± 0.475.84 ± 0.417.5 ± 10.3
Found90.34 ± 9.0563.09 ± 3.6615.12 ± 4.5254.2 ± 7.13.59 ± 0.824.33 ± 0.606.0 ± 13.0