ICP-AES法测定胡萝卜中常微量元素的研究

Study on Common and Trace Elements in Carrot by ICP-AES

分别采用微波消解法、湿法处理样品，以电感耦合等离子体发射光谱仪（ICP-AES）检测胡萝卜中Cu、Fe、Zn、Mn、Na、K、Ca、Mg、P等16种元素的含量，结果表明：红黄胡萝卜中Fe、Na、K、Ca、Mg、P等元素的含量较高，且K、Mg和Ca表现红胡萝卜〉黄胡萝卜，Fe、Na和P表现为黄胡萝卜〉红胡萝卜；Sr仅红胡萝卜中含有，含量为26.22μg/g；ICP-AES检测各元素的相对标准偏差（RSD）在0.08%~4.92%之间，各元素回收率在92.18%~106.39%之间。表明湿法消解和微波消解均具有较好的精密度和准确度。

The contents of 16 elements such as Cu, Fe, Zn, Mn, Na, K, Ca, Mg and P were studied by ICP-AES with wet digestion method and the microwave digestion in carrots. Results indicated that contents of Fe , Na, K, Ca, Mg and P were higher in both red and yellow carrots. Contents of K, Mg and Ca in red carrots were higher than that in yellow carrots;whereas contents of Fe, Na and P in yellow carrots were higher than that in red carrots. Sr was detected in red carrots and the content was 26.22μg/g. The relative standard deviations and recoveries of all elements determined with ICP-AES were between 0.08%-4.92%and 92.18%-106.39%, respectively. Combination of microwave digestion and wet digestion with the ICP-AES showed that both have better precision and accuracy.