有机和常规种植条件下樱桃番茄的营养物质含量与矿物元素ICP-AES分析

Analysis of Some Nutrients and Minerals in Organic and Traditional Cherry Tomato by ICP-OES Method

近年来随着一系列食品安全事件的发生,人们越来越关注食品安全问题。有机食品被认为是一种安全和有益于环保的食品,需求量逐年增加。采用电感耦合等离子体-原子发射光谱(ICP-AES)法对有机樱桃番茄和常规生产的樱桃番茄的Ca,Mg,K,Zn,Fe,Mn等必需元素和Cu,Cd和Pb等重金属元素含量进行了测定,同时对水分含量、总可溶性固形物、可溶性总糖、维生素C等含量进行了测定。结果发现有机栽培番茄中K、Ca和Zn的含量较常规栽培的分别高出4.52%,129.81%和65.43%,Mn的含量较常规栽培番茄低11.22%差异显著(α=0.05)。有机番茄中有益金属Mg,Fe与有害重金属Cu,Pb,Cd的含量与常规栽培的差异都不显著。有机栽培与常规栽培的番茄中可溶性糖、维生素C的含量亦都没有显著差异,但可溶性固形物、可溶性蛋白含量显著高于常规栽培的番茄。本文通过研究两种樱桃番茄营养成分和矿物元素含量的不同,为有机蔬菜的品质和安全性提供理论数据。

In the present study, the contents of nutritional elements such as Ca, Mg, K, Zn, Fe and Mn and heavy elements such as Cu, CA and Pb in organic and traditional cherry tomato fruit were analyzed by ICP-OES, and the contents of some nutritional ingredients such as water, total soluble solid, soluble sugar and asorbic acid were also investigated. The results showed that the contents of K, Ca and Zn in organic cherry tomato were 1.62, 71.7 and 1.34 mg . g^-1, which were 4.52%, 129.81% and 65. 43 % respectively higher than those in traditional tomato. There were no significant differences in the contents of Mg and Fe, which showed 73. 8 and 2. 05 mg . g^-1 in organic cherry tomato. But the content of Mn in organic tomato was 0. 475 mg . g^-1, 11.22% lower than that in traditional one （α=0. 05）. The contents of Cu, Cd and Pb showed no significant differences in the two kinds of tomato, which were 0. 457 mg . g^-1, 4. 86 ng . g^-1 and 0. 127 mg . g^-1 respectively in organic cherry tomato, and all the contents were lower than the national requirement. There were no significant differences in the contents of water, soluble sugar, and asorbic acid, but the total soluble solid and the content of soluble protein were significantly higher in organic cherry tomato. The differences in the nutritional ingredients and mineral elements and safety status in the two kinds of tomato provide academic data for the evaluation of organic vegetables and traditional ones.