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国产91福利小视频的工作原理及運用-上海91福利在线观看分析儀器有限公司

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国产91福利小视频的工作原理及運用

更新時間:2013-04-24點擊次數:5406

国产91福利小视频的工作原理:
火焰光度法是按羅馬金公式公式進行定量分析的,即i=axc的b次方,式中i為譜線的強度,c是待測元素的含量,d是與待測元素的蒸發、激發條件有關的常數;b為自吸係數,因為用火焰作激發光源,其溫度可通過控製空氣與燃氣的流量以保持穩定,又因采用液體試樣,試樣組分的影響較少,故在各次測定中a是個較穩定的常數,一般由於試樣濃度較低,自吸可忽略不計,於是i=λc,並可用相對強度的測量方法進行分析。

進行国产91福利小视频分析時,把待側液用霧化器使之變成溶膠導入火焰中,待測元素因熱離解生成基態原子,在火焰中被激發而產生光譜,經單色器分解成單色光後通過光電係統測量,由於火焰的濕度比較低,因此隻能激發少數的元素,而且所得的光譜比較簡單,幹擾較小,火焰光度法特別適用於較易激發的堿金屬及堿土金屬的測定.

在測定中為了穩定火焰和排除一些元素的幹擾,常在測定液中加入“緩衝劑",如k,ca,mg同時存在彼此間對測定有影響,如果把這三種元素配成飽和溶液為“緩衝劑",在試液中加到一定量時,則產生的影響是單一恒定值,可作本底扣除,測鈉時,大量的hco32-存在可使結果偏低,可用鹽酸酸化試液後加熱除去.     

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