Dynamics of Mineral Element Content in Leaves of Chennodium formosanum and Cultivars of Ch. quinoa during Growth Period

In order to find out the content of mineral elements in the leaves of Chenopodium plants, taking the four main varieties of quinoa cultivated in China as the target, the content of eight essential major and beneficial trace mineral elements, such as calcium, potassium and magnesium, in the growth period of quinoa was determined by microwave digestion coupled plasma mass spectrometry (ICP-MS), and the dynamic content of mineral elements was analyzed. and the dynamic content of mineral elements was analyzed. The results showed that during the edible period of quinoa leaves, the mineral element content and increase/decrease state varied with the growth of quinoa. The highest content is potassium, followed by calcium >magnesium > iron> manganese > sodium > zinc > copper. Calcium showed a gradual upward trend. while potassium, sodium, and iron showed a downward trend. and magnesium content was relatively stable. The dynamic content of manganese, zinc, and copper were similar, with an overall balance and a slight increase followed by a decrease. Quinoa leaves had high levels of calcium, potassium and manganese, with calcium content reaching 1.79 g·kg-1, average potassium content reaching 10.57 g·kg-1, and average manganese content reaching 27.1 mg·kg-1. The average content of iron, zinc, and copper was 20.3 mg·kg-1, 11.6 mg·kg-1, and 1.21 mg·kg-1, respectively. The sodium and magnesium contents were relatively low, at 0.013 g·kg-1 and 0.59 g·kg-1, respectively. At the end of the life cycle of quinoa, its leaves was no longer suitable for consumption. Due to the significant evaporation of water, the content of mineral elements increased exponentially. This article aimed to provide technical references for the scientific consumption of quinoa vegetables by tracking and analyzing the dynamic content of mineral elements during the growth period of quinoa leaves.