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. Author manuscript; available in PMC: 2011 Jul 25.
Published in final edited form as: Environ Sci Technol. 2004 Feb 1;38(3):732–737. doi: 10.1021/es034734y

TABLE 1.

Slope of Linear Regressions to Data by Sample Type for NYC Summer Samples

sample type Mn vs Fe
Mn vs Cr
slope = Fe/Mn R2 slope = Cr/Mn R2
personal 104 0.98 0.33 0.89
upwind fixed site 44 0.81 nwca 0.01
urban fixed site 56 0.75 nwca 0.02
home outdoor 68 0.80 nwca 0.25
home indoor 61 0.82 nwca 0.42
crustal ratio (27) 55 0.11
a

nwc, not well constrained.