天然彩棉与普通白棉中微量元素的比较研究

建立了微波消解电感耦合等离子体发射光谱法测定棉花中微量元素的方法，并用该法分别测定了天然彩棉和普通白棉中Ca，μg，Fe，Cu，Ba，Zn，Al，Sr，Mn和Si等元素的含量。该法检出限为0.9～21 μg·L-1,加标回收率为93%～111%，RSD<4.0%(n=5)；研究结果表明天然彩棉中棕色彩棉和绿色彩棉中Ca，Cu，Zn，Al，Fe，Sr和Si等元素含量要明显高于普通白棉。文章的研究结果可为彩棉的显色原理研究以及真假彩棉的鉴定提供一定的科学依据。

Comparative Study on Trace Elements in Natural Colored Cotton and White Cotton

A method was studied for simultaneous determination of multi-elements in natural colored cotton by microwave digestion and ICP-AES. The contents of Ca, Mg, Fe, Cu, Ba, Zn, Al, Sr, Mn and Si in colored and white cotton were determined by this method. The recovery ratio obtained by standard addition method ranged between 93% and 111%, and the relative standard deviation was below 4%(n=5). The results showed that the contents of Ca, Cu, Zn, Al, Fe, Sr and Si in green and brown cotton are higher than those in white cotton. The data from the study gives some references for further researches on the colored cotton.