赵勇　朱建荣　刀静梅

搞要：建立一种准确、简单易行且适合大批量检测甘蔗蔗汁中铁（Fe）和锌（Zn）含量的方法，是筛选、培育和改良甘蔗新品种富铁和富锌的关键。试验基于原子吸收光谱法，经改进消化处理条件，形成了一种湿化-原子吸收光谱法检测甘蔗蔗汁Fe和Zn含量，主要用于甘蔗杂交育种中Fe和Zn含量的检测，用以开展“富铁甘蔗”和“富锌甘蔗”品种选育，旨在为甘蔗品质育种提供检测技术支撑。用体积比为7∶2的混合酸（硝酸∶高氯酸）作为消解剂、同时通过控制消化温度等条件来消解处理甘蔗汁样，然后进行火焰原子吸收光谱法测定。结果表明，该方法的检出限分别为0.08 g/kg和0.042 g/kg，相对标准偏差分别为3.93%和4.41%，加标回收率在98.8%～104.0%；此方法简便、准确、灵敏度高、重复性好、回收率高，适合于甘蔗汁中Fe和Zn的检测。

关键词：甘蔗蔗汁；消化处理；原子吸收光谱法（FAAS）；Fe；Zn

中图分类号：O657.31 文献标识码：A 文章编号：0439-8114（2018）09-0100-04

DOI：10.14088/j.cnki.issn0439-8114.2018.09.024

Determination of Fe and Zn in Sugarcane Juice with Flame Atomic Absorption Spectromet

ZHAO Yong， ZHU Jian-rong， DAO Jing-mei， MA Juan， LI Fu-qin， LIU Jia-yong， YING Xiong-mei

（Sugarcane Research Institute， Yunnan Academy of Agricultural Sciences Yunnan/ Key Laboratory of Sugarcane Genetic Improvement， Kaiyuan 661699， Yunnan，China）

Abstract： The significant characteristics of sugarcane cross-breeding are lots of materials and workload. The key work that screening，cultivation and improvement of sugarcane varieties which rich in Fe and Zn are the establishment of the methods，which could be an accurate and simple method and suitable for mass inspection. For the technical guidance of sugarcane quality breeding， a method of determining the Fe and Zn in the sugarcane juice with Flame Atomic Absorption Spectromet were developed. Under the optimized conditions， the detection limits of the method for Fe and Zn were 0.08 g/kg and 0.042 g/kg，resjpectively，and the spike recoveries in sugarcane juice were in the range of 98.8%～104.0% with relative standard deviations of 3.93% and 4.41%. This method was easy to get，accurate and higher sensitivity，good recovery and respeatability，and suitable for determining Fe and Zn in the sugarcane juice.

Key words： sugarcane juice； digestion； FAAS； Fe； Zn

鐵（Fe）是血红蛋白的重要部分，缺Fe常发生在儿童和孕妇身上，常见症状表现为贫血，缺铁还可损害儿童的认知能力，严重时可增加儿童和母亲死亡率，使机体工作能力明显下降。锌（Zn）同样是人体不可缺少的微量元素，Zn可以促进儿童身体及智力发育；同时对人体的免疫功能起着调节作用，Zn能维持男性的正常生理机能，促进溃疡的愈合，常用于厌食、营养不良、生长缓慢的儿童。杨一梅[1]对大同市儿童做了一次元素缺乏调查，发现大同市儿童的微量元素水平中主要缺乏Fe和Zn。含Fe和Zn的食物主要有动物肝脏、肾脏、瘦肉、蛋黄、鸡、鱼、虾、豆类和奶制类；……