绿豆、红小豆和黑豆种皮18 种元素分析

为全面了解绿豆皮、红小豆皮和黑豆皮的18 种元素含量，充分开发利用豆皮资源，提高豆类加工产品
的附加值，用元素分析（elemental analyzer，EA）仪和电感耦合等离子体发射光谱（inductively coupled plasmaatomic
emission spectrometer，ICP-AES）仪测定了3 种豆皮的N、C、S、Ca、Mg、K、P、Na、B、Ba、Co、
Cr、Cu、Fe、Mn、Ni、Zn和Sr元素含量。结果表明，EA仪测定豆皮中N、C和S方法检出限为32～96 μg/g，回收
率为97%～115%，相对标准偏差为0.20%～2.63%（n=5）；ICP-AES测定豆皮中Ca、Mg、K、P、Na、B、Ba、
Co、Cr、Cu、Fe、Mn、Ni、Zn和Sr元素方法检出限为0.02～152 μg/g，回收率为84%～118%，相对标准偏差为
0.44%～4.46%（n=5）。黄豆标准物N、Mg、P、B、Ba、Co、Cr、Mn、Ni、Zn和Sr元素测定值在推荐范围内，
S、Ca、K、Na、Cu和Fe元素测定值接近推荐值。分析方法快速、简便，达到了应用的要求。

Analysis of 18 Elements in Seed Coats of Mung Bean,Adzuki Bean and Black Soybean

In order to fully develop and utilize bean coat resources and increase the added value of processed bean products,
the contents of N, C, S, Ca, Mg, K, P, Na, B, Ba, Co, Cr, Cu, Fe, Mn, Ni, Zn and Sr in the seed coats of mung bean, adzuki
bean and black soybean were determined by elemental analyzer (EA) and inductively coupled plasma-atomic emission
spectrometer (ICP-AES). The limits of detection (LODs) for the elements N, C and S with an elemental analyzer were
32–96 μg/g, and recovery rates were 97%–115% with relative standard deviations (RSDs) of 0.20%–2.63% (n = 5). The
LODs for the elements Ca, Mg, K, P, Na, B, Ba, Co, Cr, Cu, Fe, Mn, Ni, Zn and Sr with ICP-AES were between 0.02 and
152 μg/g, and recovery rates were in the range of 84%–118% with RSDs of 0.44%–4.46% (n = 5). The soybean standard
substance was measured using the developed methods, and the results indicated that the contents of N, Mg, P, B, Ba, Co,
Cr, Mn, Ni, Zn and Sr were within the recommended range, while the contents of S, Ca, K, Na, Cu and Fe were close to the
recommended values. The analytical methods proved to be rapid and simple and can be applied for elemental analysis.