模拟生物样品的反射式超声CT成像

本文简要介绍了反射式超声ＣＴ成像方法的原理，介绍了远场条件下的ＵＲＣＴ成像算法。对模拟生物样品进行了ＵＲＣＴ成像实验，并对多辐二维ＵＲＣＴ图像，得到了ＵＲＣＴ图像的三维显示。  

氟乙酰胺、氢氰酸混合杀鼠剂中毒检验的研究

本文描述了应用衍生化色谱技术,同时检測生物体内的氟乙酰胺、氢氰酸。用五氟溴苄和氯胺T分别作为氟乙酰胺和氢氰酸衍生化试剂,衍生化产物用GC/ECD检测,在Parapak—QS+3％DC—200混合填充柱上,均得到良好分离,平均提取回收率>81%。动物实验和案例检验证明方法准确、可靠、灵敏度高。可成功地检测中毒患者或致死者体内的氢氰酸和氟乙酰胺的含量,并适用于临床抢救监测。  

生物体中重金属元素分析方法的研究进展

重金属污染威胁人类健康和物种生存,已成为全社会关注的环境热点,因此,重金属防治和检测显得尤为重要。在分析重金属元素检测现状的基础上,该文对生物体内重金属的主要检测及样品前处理方法进行了综述,讨论了当前生物体中重金属检测的新技术,提出了所存在的问题并展望了这一方面的发展趋势,以期为发展出更灵敏、更准确、更快速的检测方法提供参考。  

Application of Box–Behnken design in the optimization of a magnetic nanoparticle procedure for zinc determination in analytical samples by inductively coupled plasma optical emission spectrometry

This article describes the development of a procedure for zinc determination in water and biological samples after extraction by magnetic nanoparticles by inductively coupled plasma optical emission spectrometry (ICP-OES). The optimization strategy was carried out by using two level full factorial designs. Results of the two level full factorial design (2⁴) based on an analysis of variance demonstrated that only the pH, amount of extractant and amount of nanoparticles were statistically significant. Optimal conditions for three variables: pH of solution, amount of extractant (E), and amount of nanoparticles (N) for the extraction of zinc samples were obtained by using Box–Behnken design. These values were 3.8, 3.1 and 3.3 mg, for pH of solution, amount of nanoparticles and amount of extractant, respectively. Under the optimized experimental conditions, the detection limit of the proposed method followed by ICP-OES was found to be 0.8 μg L⁻¹. The method was applied to the determination of zinc in water and biological samples.