Trace and Essential Elements Analysis in Cymbopogon citratus (DC.) Stapf Samples by Graphite Furnace-Atomic Absorption Spectroscopy and Its Health Concern

Table 1

AAS Vario-6 Graphite furnace elements instrumental analytical conditions.

Elements	Wavelength; (nm)	Slit width (nm)	Atomization temp. (0°C)	Matrix modifiers	Interference wavelength (nm)	Detection limit; (µg L^−1)
Mg	285.2	0.8	1500–1650	—	—	0.0025
Ca	422.7	1.2	2350–2500	—	—	0.007
Cr	357.9	0.8	2100–2200	NH4H2PO4	Fe 358.1, Nb 358.0	0.1
Mn	279.5	0.2	1600–1650	Mg(NO3)2; + Pd(NO3)2	Mg 279.5, Fe 279.5,; Pb 280.2	0.014
Fe	248.3	0.2	1850–2050	Mg(NO3)2	—	0.100
Ni	232.0	0.2	2100–2300	Mg(NO3)2	—	0.3
Cu	324.8	0.8	1800–1900	—	Ni 324.3, Mn 324.9,; Pd 324.3, Ag 324.8,; Eu 324.8	0.19
Zn	213.9	0.8	1000–1100	Pd(NO3)2	Cu 213.9, Te 214.3; As 214.4, Fe 213.6,; Fe 213.9	0.002
Mo	313.3	0.8	2500–2600	Mg(NO3)2	—	0.15
As	193.7	0.0	2050–2250	Pd(NO3)2	—	0.4
Cd	228.8	0.8	900–1200	NH4H2PO4 + Mg(NO3)2	As 228.9; Fe 228.8	0.007
Pb	217.0	0.5	1200–1350	Pd(NO3)2; + Mg(NO3)2	Cu 216.5, Fe 216.7,; Ni 216.6, Sb 217.6,; Pt 216.5	0.08