Arthrospira platensis and Arthrospira maxima are a type of blue-green microalga used as a dietary supplement (Spirulina). A low time-consuming ultrasound-assisted digestion (UAD) of Spirulina supplements for multielemental determination by microwave induced plasma atomic emission spectrometry (MPAES) was performed. Several parameters such as acid concentration (AC), thermostated water bath (TWB), digestion time (DT) and UAD – probe or bath – affecting the digestion process were evaluated through a full factorial design. Under the optimal conditions −100 °C for TWB, 5% for AC and 10 min for DT- and selecting the bath as the proper UAD system, the concentrations of 15 analytes (Al, Ba, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, V, Zn) were reported. The values are in accordance with the recommendation established by Food and Drug Administration (FDA) excepting for Cd. The knowledge of Spirulina multielemental composition contributes to an outstanding nutritional and toxicological report for human health.

柏节肢动物和最大节肢动物是一种蓝绿色微藻，用作膳食补充剂（螺旋藻）。进行了螺旋藻补品的低耗时超声辅助消化（UAD），用于通过微波诱导等离子体原子发射光谱法（MPAES）进行多元素测定。通过全因子设计评估了酸浓度（AC），恒温水浴（TWB），消解时间（DT）和UAD –探针或浴–影响消解过程的几个参数。在最佳条件下-TWB为-100°C，AC为5％，DT-为10分钟，并选择镀液作为合适的UAD系统，可以分析15种分析物（Al，Ba，Ca，Cd，Cr，Cu，Fe的浓度） ，K，Mg，Mn，Na，Ni，P，V，Zn）。除镉外，其他值均符合美国食品药品监督管理局（FDA）制定的建议。