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| 折扣與優(yōu)惠：團(tuán)購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要：本實(shí)驗(yàn)以三七、茯苓、黃連、重樓和木香為材料，通過不同的干法灰化條件對(duì)這五種中草藥進(jìn)行處理，然后用石墨爐原子吸收光譜法測(cè)定樣品中微量元素Cr的含量。探究干法灰化溫度、灰化時(shí)間對(duì)測(cè)定結(jié)果的影響，確定出這五種藥材的最佳灰化溫度、最佳灰化時(shí)間。結(jié)果表明：三七的最佳灰化條件是500 ℃、4h而茯苓、黃連、重樓和木香的最佳灰化條件是550 ℃、8h,石墨爐原子吸收光譜法能夠準(zhǔn)確、有效的測(cè)定三七等五種中草藥中Cr的含量，方法簡(jiǎn)單、方便,五種中草藥在各自的最佳灰化條件下，Cr的含量存在著差異，含量最高的是重樓，含量最低的是黃連，重樓中Cr的含量是黃連中Cr的含量的3倍，Cr含量的順序?yàn)椋褐貥?gt;三七>木香>茯苓>黃連。 關(guān)鍵詞：灰化條件；石墨爐原子吸收光譜法；中草藥；鉻
ABSTRACT：This experiment has been done with pseudo-ginseng、poria cocos、goldthread、heavy floor and elecampane as material，and the samples was digested by different ashing conditions,then determined the content of chromium in the samples by graphite furnace atomic absorption spectrometry. Research the effect of the determination results of chromium by changing ashing temperature and time, and measured the best ashing temperature and time. The results show that the best ashing conditions of pseudo-ginseng is 500 ℃and four hours, however the best ashing conditions of poria cocos、goldthread、heavy floor and elecampane is 550 ℃and eight hours. Graphite furnace atomic absorption spectrometry can accurately, effective determine the content of chromium in pseudo-ginseng etc five Chinese herbals, and this method is simple and convenient. The content of chromium in these Chinese herbals in its own best ashing conditions is different. The content of chromium in heavy floor is the highest. The content of chromium in poria cocos is the lowest. The content of chromium in heavy floor is three times as much as the content of chromium in poria cocos. The order is as follows: heavy floor > pseudo-ginseng> elecampane> poria cocos > goldthread. Keywords: Ashing conditions; Graphite furnace atomic absorption spectrometry; medicinal herbs; Chromium |
