| Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) offers extending good advantages in terms of low detection limit, high precision, little matrix effect, wide linear range and simultaneous multi-elements determination, then it is widely used in trace-elemental analysis fields in recent years. Hydride Generation-Inductively Coupled Plasma Atomic Emission Spectrometry hyphenated techniques expand detection power of ICP-AES to hydride-forming elements. The detection limits of hydride-forming elements can be improved by one or two order of magnitude over conventional nebulizer, and nearly eliminated matrix spectrum interference. Therefore, it opens up a new way to solve complex matrix samples and elemental valence, speciation analysis .With the improvement of living standard and the influence of the idea of "returning to nature", people pay much attention to Chinese traditional medicine(CTM), especially to the researcher of detection method of the toxic elements that have a close connection with the health of people. After trace elements in CTM enter the human body , they make a strong impact on our health. Especially, some trace toxic elements in CTM such as lead, cadmium, arsenic, mercury, will show poisonous effection even if their concentration is very low. Moreover, we should pay much attention to elemental speciation when determining the total amount of trace elements. It is well known that the physiology, toxicity influence, biogeochemical behavior, environmental behavior and transformation of trace toxic elements highly dependent on their chemical speciation to some great extent . Speciation analysis has already become an active front subject in environmental sciences, biochemistry and life sciences at present .Establishing the speciation analysis methodology will help to disclose the essence of trace amount elements in CTM. China , has plenty of CTM resources and uses it widely .The contents of some poisonous elements and their speciation in CTM should be controlled rigidly and it is crucial for our country to establish some simple ,united ,fast and valid analytical method ,improve the inherent quality of CTM, so we can keep the drugs trait and take medicines safely. In this paper, the detection method of trace toxic elements in CTM .was studied by hydride generation inductively coupled plasma atomic emission spectrometry, as follows:1. I designed the simple continuous flow hydride generator ,thus set up the interface of gas sampling technique with ICP-AES on the basis of the hydride generator. The advantage of hydride generator mainly lies in good stability and high gas liquid separate efficiency, washing easily, loading and unloading easily, and reducing the hydride-forming elements interference which is caused by precipitate particles and coexist ion. Its analysis performance was studied. The detection limits of hydride-forming elements were improved one or two order of magnitude over conventional nebulizer.2. A new method was proposed for simultaneous determination of trace arsenic, cadmium, lead and mercury in Dyer's woad root by HG-ICP-AES. Effects of parameters on performance were studied systematically. The operation condition of hydride generation and inductively coupled plasma atomic emission spectrometry was investigated and optimized. The mechanism of enhancement sensitivity effect of potassium ferricyanide to plumbane generation efficiency was studied. Under the optimum condition, the detection limits (3σ) of arsenic, cadmium, lead and mercury were 0.5, 1.4, 0.25 and 0.33ng ·mL-1; the relative standard deviations were 1.6, 2.3, 2.0 and 2.6% (n=11); the recovery were 98, 101, 103 and 108%, repectively. 3. A method for the determination of water-soluble antimony (Ⅲ) and antimony(Ⅴ) in Leigongteng using hydride generation inductively coupled plasma atomic emission spectrometry was developed in this chapter.,and first extracted antimony species in CTM by ultrasound-assisted extraction. Affecting parameters, containing ultrasound extraction, the pH of antimony s...
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