不同红梨品种果实中营养元素含量的光谱测定

用火焰原子吸收光谱法对美人酥、红酥脆和满天红3个红梨品种果实中K，Fe，Zn，Ca，Cu，Mg和Mn七种营养元素含量进行了测定分析。各元素在实验范围内，线性关系良好，回收率在98%～104%之间，结果较为满意。3个红梨品种果实中均含有丰富的营养元素，且含量均是K＞Fe＞Zn＞Ca＞Cu＞Mg＞Mn。不同品种果实中，K，Zn，Mg和Mn含量为美人酥＞红酥脆＞满天红;Fe和Cu含量为红酥脆＞满天红＞美人酥;Ca含量为满天红＞红酥脆＞美人酥;七种营养元素总量为红酥脆＞美人酥＞满天红。

Spectrometric Determination of the Content of Nutritional Elements in Fruits of Different Red Pear Varieties

A study was carried out on the contents of nutritional elements such as K,Fe,Zn,Ca,Cu,Mg and Mn in three different red pear varieties,namely Meirensu,Hongsucui and Mantianhongs,by flame atomic absorption.The results indicated that the linear relationships for different elements within the limits of working curves are good,and the range of recovery is 98%-104%,hence showing that the results asre satisfactory.There are abundant nutritional elements in fruits of the three different red pear varieties,meaning that they all have a relatively high nutritive value.In fruits of the three red pear varieties,the content sequence of different nutritional elements was found to be K>Fe>Zn>Ca>Cu>Mg>Mn.In fruits of the three different red pear varieties,the content sequence of K,Zn,Mg and Mn was Meirensu>Hongsucui>Mantianhong;the content sequence of Fe and Cu was Hongsucui>Mantianhong>Meirensu;and the content sequence of Ca was Mantianhong>Hongsucui>Meirensu;and the total content sequence of seven nutritional elements was Hongsucui>Meirensu>Mantianhong.