Determination of trace metal ions in Gentiana rigescens by inductively coupled plasma-optical emission spectrometry after deep eutectic solvent-based digestion and related pharmacodynamic evaluation

Atomic spectrometry update: review of advances in the analysis of clinical and biological materials, foods and beverages

“…Results were reported for all elements except Ag, Cd, K, Li and Ni, in the 10 or 12 samples. Yang et al 64 determined Co, Cr, Cu, Ni, and Zn in the traditional medicinal plant Gentiana rigescens by ICP-OES. Sample (100 mg) was added to 2 mL DES (ChCl + oxalic acid) and the mixture ultrasonicated at 40 °C for 20 min, after which 5 mL of 2 mol L −1 HNO 3 was added.…”