Spectrometric Determination of Microelements in Alfalfa Leaves

[Objective]The purpose aimed to realize nutrition value of Alfalfa leaves.[Method] Ten kinds of microelements(Na,K,Ca,Mg,Fe,Zn,Cu,Mn,Cr and Co) in leaves at seedling stage of Gongnong 1,Zhongmu 1,American Phabulous and American GoldenEmpress Alfalfa were detected and analysed by flame atomic absorption spectrometry(FAAS).[Result]The results indicated that the precision and recovery for different elements within the limits of working curves were good,the range of recovery(n=5) was 95%-105% and the RSD was lower than 5%.There were abundant nutritional elements for people in Alfalfa leaves.In the leaves of four Alfalfa,the content sequence of different microelements was found to be CaKZnMgNaFeMnCoCuCr.The content sequence of Na,Mg,Fe and Zn was Gongnong 1Zhongmu 1American PhabulousAmerican GoldenEmpress,the content sequence of Ca,Cu,Mn and Co was American GoldenEmpressGongnong 1American PhabulousZhongmu 1,the content sequence of K and Cr was Gongnong 1 American GoldenEmpress American PhabulousZhongmu 1.[Conclusion]The results of this study will provide useful evidence for effective exploitation of Alfalfa leaves.