Table 3.

Element concentrations (mg/kg) in house dust by particle size from Tucson residences (n=10)

		particle size <63 μm				particle size ≥63 and <150 μm
Element	MDLa	DF (%)b	GMc,d	GSDc,e	Range	DF (%)b	GMc,d	GSDc,e	Range
Be*	0.003	100	0.23	1.29	0.13-0.31	100	0.13	1.66	0.04-0.23
B	0.011	100	22.52	2.16	7.93-122.32	100	18.27	2.47	6.17-123.92
Na	0.006	100	3505.00	3.20	813.48-27201.38	100	3701.06	4.05	652.63-74493.06
Mg	0.009	100	3423.43	1.27	2237.81-4943.84	100	2107.85	1.49	1170.59-5022.54
Al*	0.004	100	7407.65	1.37	4187.65-12312.75	100	4144.84	1.43	1713.32-5959.99
Si	0.005	100	73.72	5.33	14.78-1442.14	100	265.08	2.73	51.17-1176.96
P	0.150	100	580.22	1.64	304.06-1250.45	100	422.36	1.57	215.15-1062.61
K	0.006	100	2387.74	1.55	1294.72-4245.57	100	1455.29	2.16	200.64-2749.19
Ca	0.005	100	21716.91	1.66	7371.25-49674.67	100	11313.25	2.15	1637.59-24447.65
Ti	0.006	100	100.64	1.87	37.10-259.73	100	57.27	1.47	32.07-93.09
V*	0.005	100	10.95	1.27	7.70-18.78	100	6.37	1.50	2.94-9.68
Cr	0.006	100	37.49	2.15	14.90-187.06	100	25.62	3.01	9.86-483.36
Mn	0.003	100	198.52	1.61	107.69-373.24	100	97.61	1.65	35.61-167.47
Fe	0.011	100	6776.86	1.28	5070.45-10811.94	100	5275.51	1.70	2048.99-13466.47
Co	0.002	100	5.26	1.50	2.41-8.14	100	2.91	1.56	1.57-6.11
Ni	0.005	100	21.34	1.92	8.92-51.11	100	15.19	2.38	4.13-57.66
Cu	0.003	100	69.09	2.70	37.72-958.31	100	57.32	1.70	29.70-149.97
Zn	0.002	100	311.35	2.46	68.94-1152.34	100	186.02	3.46	34.35-2569.10
Ge	0.004	100	0.06	1.20	0.04-0.08	100	0.04	1.83	0.01-0.07
As	0.003	100	3.04	1.64	1.71-7.57	100	2.03	2.52	0.56-17.44
Se	0.012	100	0.64	1.85	0.31-1.89	90	0.39	5.36	BDL-2.95
Zr	0.006	100	37.57	3.01	8.07-245.32	100	34.92	3.21	8.01-407.41
Nb	0.006	100	0.17	1.98	0.06-0.46	100	0.17	1.49	0.08-0.25
Mo*	0.002	100	3.17	1.42	2.13-7.38	100	1.41	1.45	0.75-2.50
Ag	0.004	100	0.89	2.53	0.23-3.99	100	0.84	2.50	0.22-6.17
Cd	0.004	80	0.15	10.54	BDL-1.16	70	0.08	13.83	BDL-2.14
Sn	0.009	100	0.90	1.83	0.35-2.18	100	4.47	3.78	0.78-49.81
Sb	0.009	80	0.02	5.15	BDL-0.88	100	0.11	3.66	0.02-0.57
Ba	0.003	100	123.07	1.54	53.10-196.93	100	65.29	1.59	35.85-192.45
Pb	0.004	80	3.11	49.47	BDL-26.32	100	19.42	3.03	2.48-147.74

^aMDL – minimum detection limit, BDL – below detection limit

^bDF – detection frequency

^c0.5*MDL used for samples <BDL

^dGM – geometric mean

^eGSD – geometric standard deviation

^*indicates signficiance after Bonferroni correction (p<0.0017)