Greening Ultrasound-Assisted Extraction for Sorghum Flour Multielemental Determination by Microwave-Induced Plasma Optical Emission Spectrometry

Table 1

Instrumental parameters and analytical figures of merits of the proposed UAE method by MIP OES.

Instrumental parameters	Operational conditions
Plasma power (W)	1000
Stabilization time (s)	10
Background correction	Auto
Integration time (s)	3
Nebulizer	OneNeb®
Spray chamber	Double pass cyclonic
Sample floe rate (rpm)	15
Replicates	3
Analyte	Cu	K	Mg	Mn	P	Zn
Wavelength (nm)	324.754	766.491	285.213	403.076	213.618	213.857
Viewing position	0	−10	−10	0	−10	−10
Nebulizer gas pressure (kPa)	180	220	200	240	220	160
LOD (mg kg ^−1)	0.6	3.1	11.5	2.0	52	2.0
LOQ (mg kg ^−1)	1.9	9.5	34.9	6.0	172	6.0
RSD (%)	5.43	4.80	0.27	7.11	7.72	1.48
R^2	0.99	0.99	0.99	0.99	0.99	0.99