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Table 5 Comparison of heavy metal concentrations (mg/kg) in laboratory- reared and field mosquitoes

From: Urban mosquitoes and filamentous green algae: their biomonitoring role in heavy metal pollution in open drainage channels in Nairobi industrial area, Kenya

Site of sample collection/assortment Heavy metals analyzed and their concentration (mg/kg)
Sample’s code Hg (1.0)a Pb (0.01) Cr (0.1) Cd (0.01) Tl (0.02) Ni (0.1)
Field samples        
 Sinai (Mean) G-m (Cx: larvae) 0.084 19.31 19.20 0.10 0.06 6.00
 Kartasi F-m (Cx: adults) 0.031 1.73 2.00 0.06  < 0.02 0.70
 Donholm H-m (Cx: adults) 0.072 3.52 3.20 0.08  < 0.02 1.00
 Assorted field samplesb As-f (Cx: adults, larvae) 0.048 8.09 17.70 0.12  < 0.02 1.60
 Mean ± SE (ppm)   0.059 ± 0.01 8.16 ± 3.95 10.53 ± .59 0.09 ± 0.01 0.03 ± 0.01 2.33 ± 1.24
Control samples        
 Assorted laboratory samples As-lc 0.260 4.89 4.40 1.80  < 0.02 1.80
  1. aThe digit in bracket shows the method detection limits (MDL) measured in mg/kg except for Hg which was in µg/kg. However, the data for Hg was converted into mg/kg for consistency
  2. bAssorted field samples implies a mixture of adult mosquitoes and larvae trapped from the field
  3. cAssorted laboratory samples implies a mixture of laboratory reared adult Anopheles and Aedes mosquitoes and their larvae