Determination of Interesting Toxicological Elements in PM_2.5 by Neutron and Photon Activation Analysis

Table 2

Results of INAA quality control on IAEA air filter samples (µg g⁻¹). The “measured value” is the average of seven determinations on seven different replicates. s.d.: standard deviation; n.d.: not detected.

Element	Measured value	Certified value	Average value
	Mean ± s.d.	Mean	Mean	2σ (%)
As	4.9 ± 0.5	5.6	4.59	43
Au	1.26 ± 0.10	1.15	1.06	21
Ba	43.4 ± 0.5	53.8	39.05	40
Cd	10.6 ± 1.0	9.96	9.8	18
Co	1.3 ± 0.1	1.12	1.18	38
Cr	4.7 ± 0.8	5.6	4.8	13
Cu	51.6 ± 0.5	48.8	44.8	16
Fe	193 ± 17	207.9	200.1	8
Mn	31.2 ± 1.0	31.9	30.1	14
Mo	1.26 ± 0.2	1.14	1.56	70
Se	1.01 ± 0.10	1.06	1.01	11
U	0.78 ± 0.10	1.02	0.99	14
V	8.04 ± 0.35	8.00	7.2	16
Zn	132 ± 18	152	141	12