ICP-AES 法测定砂糖橘中的矿质元素含量

摘要

The contents of 14 elements such as Cu, Fe, Zn, Mn, Na, K, Ca, Mg and P were studied by ICP-AES with microwave digestion in Citrus reticulata Blanco cv.‘shiyueju’, and the results showed that, the contents of K, Ca, Mg, P were higher inpeel and pulp.The content of K in the pulp were very high, reached 9 082.23 ug/g, while the content of Na were very low, with only 80.45 ug/g.The Cr elements were not detected in fruit peel and pulp.Sr was not detected in the flesh, but its content was 10.24 ug/g in the peel.The content of B, Ca, Mg, Fe, Mn, Si, Zn in peel were higher than that in the flesh.The relative standard deviations and recov-eries of all elements determined with ICP-AES were between 0.18%~4.77%and 95.15%~106.1%respective-ly.The combination of microwave digestion with the ICP-AES showed that this technolgy has better precision and accuracy .%以市售广西砂糖橘为材料，采用微波消解法处理样品，以电感耦合等离子体发射光谱仪（ ICP-AES ）检测砂糖橘中Cu、 Fe、 Zn、 Mn、 Na、 K、 Ca、 Mg、 P等14种矿质元素的含量，结果表明，砂糖橘果皮和果肉中K、Ca、 Mg、 P等元素的含量较高；果肉中K含量尤其高，达到9082畅23 ug／g，而Na含量则很低，果肉中仅含80畅45 ug／g，元素Cr在果皮和果肉中均未检出； Sr在果肉中未检出，在果皮中含量为10畅24 ug／g；在砂糖橘果皮中B、 Ca、 Mg、 Fe、 Mn、 Si、 Zn 7种元素含量均高于果肉。加标回收率实验表明，各元素的相对标准偏差（ RSD）为0畅18％～4畅77％，各元素的回收率在95畅15％～106畅1％之间，说明该方法测定广西砂糖橘中矿质元素具有较好的精密度和准确度。