Determination of elements in cereals, pseudocereals, and legumes by microwave plasma-atomic emission spectrometry
Year: 2024
Type: article
Abstract: A novel method for multi-element analysis in cereals, pseudocereals, and legumes was developed for principal (calcium, magnesium, potassium, and phosphorus) and trace (manganese, zinc, iron, copper, and aluminum) element determination using a microwave plasma-atomic emission spectrometer (MP-AES). The method was validated using certified reference analyte values from durum wheat (DUWF-1), corn bran (BRAN-1), quinoa (KINO-1), rice (SRM 1568b), and soy (SRM 3234). Spike recoveries were assessed using field-grown crops that represent staple and minor crops with variable matrix compositions. A closed-vessel microwave-assisted digestion method consisting of 12 mL of deionized water, 2 mL of HNO3, and 2 mL of H2O2 was efficient for the mineralization of all crops. Acceptable measurement agreement was achieved between certified and determined values for all reference materials with recovery ranges from 89 to 120 percent. Plant breeders can use the method to develop and screen crops for improved nutrient density. • Method validated with five certified reference materials and analyte spike recoveries. • Crop minerals were extracted using a closed-vessel microwave system with diluted acid. • Cesium ionization buffer improved calcium recovery. • Low-cost alternative method to ICP-OES for plant breeding programs.
Source: Food Chemistry X
Institution: Washington State University
Language: English
Subfield: Analytical Chemistry
Field: Chemistry
Domain: Physical Sciences
SDG: Zero hunger
Open Access status: gold
Estimated APC paid: $2,350
Award: G167628252
OpenAlex ID: W4402564163