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Table 2 Statistical data of NBFR concentrations (ng/g) in two dust categories

From: Novel brominated flame retardants in house dust from Shanghai, China: levels, temporal variation, and human exposure

Dust category/compound PBT PBEB HBB EHTBB BTBPE BEHTEBP DBDPE 7NBFRs
FD sample (n = 132)
 Detection (%) 93.5 88.9 96.8 63.6 100 55.2 100
 Minimum < LOD < LOD < LOD < LOD 0.58 < LOD 14.70 19.11
 5th Percentile 0.06 0.04 0.34 0.17 2.97 0.11 34.68 43.33
 Median 0.32 0.20 2.13 2.26 14.49 0.13 185.4 290.8
 95th Percentile 2.81 2.35 17.14 59.37 184.5 53.75 1571 1630
 Maximum 25.77 7.00 27.32 143.7 526.1 224.0 2931 3099
 Mean 0.96 0.45 3.65 12.64 42.68 12.1 419.4 491.8
 Std. deviation 2.83 0.90 4.78 23.76 84.03 28.50 575.4 579.7
 Geomean 0.38 0.21 2.11 1.85 17.26 0.84 219.6 295.1
ESD sample (n = 22)
 Detection (%) 77.3 81.8 100 90.9 100 63.6 100
 Minimum < LOD < LOD 0.61 < LOD 0.37 < LOD 16.90 37.74
 5th Percentile 0.03 0.04 0.61 0.17 0.37 0.11 16.9 37.74
 Median 0.59 1.20 2.41 2.80 9.30 0.98 71.43 104.8
 95th Percentile 7.87 7.87 16.9 26 37.88 45.43 349.4 404.6
 Maximum 7.87 7.87 16.9 26.10 37.88 45.43 349.4 404.6
 Mean 1.31 1.81 4.00 6.58 14.02 8.09 102.5 136.9
 Std. deviation 2.03 2.15 4.34 7.04 11.48 12.36 88.05 88.28
 Geomean 0.45 0.73 2.60 3.24 9.59 1.17 76.89 117.9