Analysis of Metal Contents in Portland Type V and MTA-Based Cements

Table 4

Means and standard deviations of metal contents (mg/kg) for the tested materials by using atomic absorption spectrophotometry.

Metal	Cement
	Structural white PC	Type V gray PC	MTA Bio	ProRoot MTA
Arsenic	3.70 ± 0.10^b	5.40 ± 0.10^a	3.05 ± 0.10^c	2.80 ± 0.20^c
Bismuth	240.00 ± 10.00^d	80.00 ± 10.00^c	57.400.00 ± 7.230.00^b	97.630.00 ± 30.970.00^a
Cadmium	<QL	<QL	<QL	<QL
Calcium	316.380.00 ± 31.370.00^a	240.220.00 ± 10.140^b	248.710.00 ± 21.370.00^b	214.870.00 ± 26.100.00^b
Chromium	25.00 ± 4.00^c	47.00 ± 1.00^a	36.00 ± 2.00^b	16.00 ± 1.00^d
Copper	5.00 ± 0.00^b	6.00 ± 0.00^a	5.00 ± 0.00^b	5.00 ± 0.00^b
Iron	740.00 ± 40.00^c	6.450.00 ± 540.00^a	1.380.00 ± 90.00^b	650.00 ± 80.00^c
Lead	30.00 ± 00.00^b	40.00 ± 0.00^a	30.00 ± 00.00^b	30.00 ± 0.00^b
Manganese	55.00 ± 3.00^d	314.00 ± 15.00^a	66.00 ± 1.00^c	82.00 ± 7.00^b
Nickel	30.00 ± 0.00^a	20.00 ± 0.00^b	18.00 ± 0.00^c	12.00 ± 0.00^d
Zinc	130.00 ± 10.00^a	120.00 ± 00.00^b	30.00 ± 10.00^c	10.00 ± 0.00^c

<QL lower than the quantification limit of the device (0.002 mg/kg).
Superscript lower case letters compare groups in horizontal lines. Different letters represent statistically significant difference ().