原子荧光光谱法测定硒

原理上是一致的,原子吸收法测定的是能量跃迁时的吸收能 而原子荧光测定的是返回基态时得荧光值.他们只是测定了物理反应的两个阶段.冷原子吸收光谱法测定汞的时候还要在原子吸收分光光度计上另外加一个装置 氢化物发...

一般来说,温度高,荧光强度大.
简单原理：“气化”的原子中的电子受热从基态被激发到激发态,当激发态的电子跃迁回基态时,放出一个光子.若在这个过程中,电子的自旋态没有变化,这个光子就叫做“荧光”光子；若在这个过程中,电子的自旋态从三重态变化到单重态,这个光子就叫做“磷光”光子.

不可以吧,原子荧光法的适用范围比较狭窄,主要适用于以下十一种元素：易形成冷原子蒸汽的Hg,易形成气态氢化物的As,Sb,Bi,Se,Te,Ge,Pb,Sn以及可以形成气态组分的Cd,Zn,你可以考虑使用原子吸收测铜的含量

Hydride-atomic fluorescence spectrometry antimony pounds and antimony trioxide of arsenic
Abstract: to establish a hydride-atomic fluorescence spectrometry antimony pounds and antimony trioxide arsenic in the new method. Samples by strong acid dissolution after completely, the sodium hydroxide matrix trace arsenic antimony precipitation and separation to 20% (V/V) for the determination of hydrochloric acid medium, in atomic fluorescence spectrometer on the arsenic determination, separation effect is good, the determination results stability. Methods of detection limit for 0.156 ng/mL, relative standard deviation (n = 11) of 1.12%.
Keywords: antimony pounds; Antimony trioxide; Arsenic; Hydride atomic fluorescence spectrum-
Figure 1 thiourea-ascorbic acid on the influence of the fluorescence intensity (thiourea-ascorbic acid, fluorescence intensity)
Table 1 the accuracy of the method of contrast (sample name, sample Numbers, this law analysis results, national standard analysis results)

[目的] 应用断续流动氢化物发生原子荧光光谱法对水果中微量硒进行了分析研究.
[方法] 样品经盐酸：高氯酸消化后,用双道原子荧光光谱仪测定水果中微量硒含量.
[结果] 元素的检出限为0．0085µg／L,线性良好,线性相关系数>0．999.灵敏度高、重现性好,砀山梨、苹果、葡萄、西瓜、柿子、祢猴桃6种水果的RSD分别在3％∼8％之间,用(SB010115上海测试所)标样作质控,分析结果与标准值吻合.回收率为94.5％∼107.5％.平均值为98．9％.
[结论] 本法快速灵敏,方法简单.

使用连续流动进样方式的原子荧光就不存这个问题啦.

　　Microwave digestion- determination of mercury in hair by atomic fluorescence spectrometry
　　center for disease control and prevention , taiKang county , henan province.
　　Abstract: investigating the methods of the determination of mercury in hair developed from microwave digestion - atomic fluorescence spectrometry.
　　Method: taking hair sample in occipital area which has a distance about 0.5 cm to 2.5 cm to the hair root , and washed with neutral shampoo, then drying it. After the samples digested by microwave,using atomic fluorescence spectrometry to determinate the mercury in hair.
　　Results:The correlation coefficient is 0.9995, the standard recovery rate of the sample is 94.1% - 94.1%, relative standard deviation (RSD) is 1.3% to 1.3%.
　　Conclusion:The test results show that this method has good accuracy and precision and high sensitivity. It's suitable for the quantitative analysis of mercury in human's hair.
　　Keywords: microwave digestion, atomic fluorescence spectrometry, human's hair, mercury