Table 3.

Average Concentration (mg/Kg) ± RSD of lipsticks using different acid digestion methods.

	Elements	Acid Digestion Methods
		A-1 (HNO3(aq) + H2O2(aq))@ 95 °C for 3 h	B-1 (HCl(aq) + HNO3(aq)@108 °C for 2 h	C-1 (HNO3(aq) + HCl(aq) + H2O2(aq)) @ 125 °C for 2 h
With Triton X-100	As	0.93 ± 2.85	0.59 ± 0.81	0.72 ± 3.96
	Cd	0.57 ± 0.87	0.48 ± 2.77	0.50 ± 1.73
	Cr	4.59 ± 1.24	<LODCr*	<LODCr*
	Pb	4.55 ± 3.28	0.79 ± 0.51	1.96 ± 1.41
	Hg	0.06 ± 1.31	0.03 ± 3.88	0.06 ± 0.66
	Ni	50.52 ± 0.22	7.16 ± 2.87	27.37 ± 1.79
		A-2 (HNO3(aq) + H2O2(aq))	B-2 (HCl(aq) + HNO3(aq)	C-2 (HNO3(aq) + HCl(aq) H2O2(aq))
Without Triton X-100	As	0.72 ± 0.19	0.22 ± 2.13	<LODAs⁎⁎
	Cd	0.42 ± 3.34	0.18 ± 0.04	0.29 ± 3.77
	Cr	2.41 ± 3.56	<LODCr*	<LODCr*
	Pb	2.79 ± 2.97	0.66 ± 0.04	3.39 ± 3.97
	Hg	0.04 ± 2.81	0.02 ± 2.96	0.05 ± 2.50
	Ni	56.86± 0.18	5.55 ± 1.41	20.37 ± 1.27

^⁎LOD _Cr = 7.09 x 10⁻² mg/L.

^⁎⁎LOD _As = 1.99 x 10⁻⁴ mg/kg.