Abstract：Based on the same habitat conditions of typical steppe in Inner Mongolia, studies were carried out about the response of mineral elements of Caragana korshinskii, C. microphylla and C. stenophylla as the representative of shrub species to plant drought resistance. Samples of the grass leaves were digested with microwave digestion, and 11 mineral elements contents of K, Ca, Mg, P, Mn, B, Na, Zn, Cu, Ni and Mo in the solution were determined with Inductively Coupled Plasma Mass Spectrometry (ICP-MS) with the equipment of collision/reaction pool (ORS) which effectively eliminate interference. HNO3 and H2O2 was used to achieve the complete decomposition of the complex matrix in a closed-vessel microwave oven. The results showed that the limit of detection for the K, Na, Ca, Mg and P varied from 0.62 to 2.90 μg·L-1, and the Cu, Zn, Mn, Ni, Mo and B from 0.01 to 0.12 μg·L-1. The recovery rate was found to be 82.0%~117.2% in adding standard recovery experiment and the relative standard deviation(RSD) was between 1.12% and 3.68%, which mean that this method was simple, sensitive and precise. The results showed that the contents of mineral elements in the leaves of three species were K>Mg>P>Ca, and it is possible that the determination of the contents of mineral elements in the plant species were made in the same time, promptitude and batch analysis. The concentration of Mn, Cu and Zn in C. microphylla were higher than that of C. korshinskii and C. stenophylla, and the latter were similar. Of the total amount of the 11 kinds of mineral ions of the three species, C. korshinskii was the highest (40 089.32 μg·g-1), which was significantly higher than that of C. microphylla and C. stenophylla. As the routine method in our laboratory, the satisfactory results indicate that it has great potential for the determination of all mineral elements by one single analysis and batch measurement in plant samples. This study provides basic data for the study of plant nutrition and ion groups.
Key words：Inductively coupled plasma mass spectra; Grass plant leaves; Mineral elements; Octopole collision/reaction system
惠岑怿，冯金朝，石 莎. 内蒙古锦鸡儿属植物叶片矿质元素的电感耦合等离子体质谱分析[J]. 光谱学与光谱分析, 2018, 38(04): 1240-1244.
HUI Cen-yi, FENG Jin-chao, SHI Sha. Study on the Determination of Mineral Elements in Three Caragana Fabr. Species in Inner Mongolia by Inductively Coupled Plasma Mass Spectrometry. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(04): 1240-1244.
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