应用ICP-MS测定双低与双高油菜籽的矿质元素含量

油菜籽中含有丰富的人体及动物必需的矿质元素,但有关不同品种油菜籽矿质元素含量差异的研究较少.选取我陶长江流域冬油菜主产区正在种植的33个双低品种和12个传统双高品种,借助ICP-MS对比分析了两类甘蓝型油菜籽的矿质元素含量.检测结果表明,油菜籽中富含P,K,Ca,Mg,S,Fe,Mn等矿质元素,不同品种油菜籽矿质元素含量有一定差别.双低油菜籽中P,K,Ca,Mg和S的平均含量分别为6.26,10.17,6.75,4.82和4.52 mg·g-1,Fe,Mn,Cu,Zn和B含量为96.20,37.10,3.84,41.61和12.16 μg·g-1;双高油菜籽中P,K,Ca,Mg,S和微量元素Fe,Mn,Cu,Zn,B的平均含量分别为5.97,10.14,6.31,4.50,9.06 mg·g-1和77.03,49.86,3.72,40.58,11.79μg·g-1.在测定的10种元素中双低品种有八种(P,K,Ca,Mg,Fe,Cu,Zn和B)高于双高品种,其中Ca,Mg和Fe含量的差异达到显著水平.油菜籽在矿质元素含最上的若异可作为推广应用双低品种的必要因素之一.

Application of ICP-MS to Detection of Mineral Elements in Double-Low and Double-High Rapeseed

The object of the present study was to investigate ten necessary mineral elements in different varieties of rapeseed by ICP-MS. Thirty three samples of double-low (low in both glucosinolates and erucic acid) rapeseed (DLR) and 12 samples of double-high rapeseed (DHR) in the Yangtze River Valley were collected. The results showed that rapeseed contained many kinds of necessary elements, and there was a difference between DLR and DHR. The average concentrations of P, K, Ca, Mg, S, Fe, Mn, Cu, Zn and B in DLR were 6.26 mg·g-1, 10.17 mg·g-1, 6.75 mg·g-1, 4.82 mg·g-1, 4.52 mg·g-1, 96.20 μg·g-1, 37.10 μg·g-1, 3.84 μg·g-1, 41.61 μg·g-1 and 12.16 μg·g-1, respectively, while for the mineral elements in DHR, the average values were 5.97 mg·g-1, 10.14 mg·g-1, 6.31 mg·g-1, 4.50 mg·g-1, 9.06 mg·g-1, 77.03 μg·g-1, 49.86 μg·g-1, 3.72 μg·g-1, 40.58 μg·g-1 and 11.79 μg·g-1. The contents of most elements in DLR were higher than those in DHR, such as P, K, Ca, Mg, Fe, Cu, Zn and B. Furthermore, the differences in Ca, Mg and Fe contents between the two varieties were significant. It was concluded that the difference in concentrations of mineral elements can be regarded as a necessary factor for popularizing double-low rapeseed in the Yangtze River Valley.