原子吸收法测定双黄连口服液中微量元素

[目的]测定双黄连口服液中微量元素Cu、Mn、Fe、Zn、Pb、Cd的含量.[方法]利用湿法消化处理样品,采用火焰原子吸收分光光度法测定Cu、Mn、Fe、Zn含量,石墨炉原子吸收分光光度法测定Pb、Cd含量.[结果]双黄连口服液中Cu、Mn、Fe、Zn、Pb、Cd含量分别为0.418 7、4.8520、3.687 3、5.304 7、0.553 5、0.022 l mg/L,其中Cu、Pb、Cd含量均未超标,可以安全服用.[结论]利用原子吸收法测定双黄连口服液中的微量元素含量结果准确、可靠,该方法可用于其他中成药口服液中微量元素的测定.     

原生态从江香禾糯中Fe、Cu含量的测定

[目的] 测定黔东南林区从江县的原生态香禾糯稻中微量元素Fe和Cu的含量,为该地香禾糯资源开发和利用提供依据.[方法] 微波消解样品,采用火焰原子吸收光谱法测定其中的微量元素Fe和Cu.[结果] 原生态从江香禾糯中微量元素Fe和Cu含量分别为73.11和1.50 mg/kg.[结论] 原生态从江香禾糯中微量元素Fe、Cu的含量较高,对于调节人体一些生理功能具有重要作用,应给予大力开发利用.     

高山绿茶浸出液中金属元素含量的测定

[目的]测定高山绿茶浸出液中金属元素的含量,为其进一步的研究利用提供参考依据.[方法]湿法消化处理和去离子水浸泡后处理高山绿茶样品,利用火焰原子吸收分光光度法(FAAS)测定Mg、Fe、Mn、Cu、Zn、Ni和cr元素的含量.[结果]高山绿茶样品中金属元素含量多少顺序为Mn>Mg>Fe>Zn>Cu>Ni>Cr;各元素的加标回收率为95.05%～101.63%;相对标准偏差为1.67%～4.07%, 准确度和精密度符合要求;不同浸泡时间茶水中金属元素含量不同,30min浸泡液含量较高.[结论]FAAS法测定高山绿茶中金属元素含量及溶出特性的方法可行, 结果可靠.     

微波消解-电感耦合等离子体质谱法测定钽酸锂中痕量杂质元素

钽酸锂中杂质元素含量是划分产品等级的重要参数。样品中加入硝酸和氢氟酸后用微波消解法溶解样品,在线加入1.00 μg/mL的Cs内标溶液后,在H₂动态反应池模式下测定Ca、Fe、As、Se,在标准模式下测定其余元素,建立了微波消解-电感耦合等离子体质谱法(ICP-MS)测定钽酸锂中Be、B、Na、Mg、Al、K、Ca、Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、As、Se、Zr、Nb、Mo、Cd、Sb、Ba、Hf、W、Pb和Bi共28种杂质元素含量的方法。对溶样方法进行了优化,确定选用2 mL硝酸-2 mL氢氟酸体系于190 ℃保温120 min的方式微波消解样品。在优化的实验条件下,28种元素的检出限为0.003~0.37 μg/g,定量限为0.01~0.74 μg/g。采用实验方法测定市售钽酸锂样品中Mg、Al、Ca、Ti等28种杂质元素含量,测定结果的相对标准偏差(n=7)均小于5%,加标回收率为87%~112%。采用电感耦合等离子体原子发射光谱法(ICP-AES)对样品中Fe含量进行测定,测定结果与实验方法基本一致。     

微波消解石墨炉原子吸收光谱法测定茶叶中镍

[目的]利用微波消解石墨炉原子吸收法测定茶叶中镍含量.[方法]分别从消解液和样品消解量方面进行消解条件的优化,以建立最适合的消解方法.[结果]茶叶样品以5 ml HNO3-2 ml H2O2 混合体系为消解液,坡度升温方式微波高压密闭消解结合石墨炉原子吸收光谱法测定,样品检出限为0.15 μg/g,回收率为97.8%,RSD为1.9%.[结论]该方法简单快速,效率高,劳动强度低,是进行茶叶中镍元素测定的高效方法.     

微波消解-石墨炉原子吸收法测定豆腐花中的铅

[目的]建立一种简便、快速测定豆腐花中铅含量的方法.[方法]采用微波消解法处理豆腐花样品,石墨炉原子吸收光谱法测定豆腐花中铅含量,并通过正交试验设计方法对微波消解参数进行了优化.[结果]测定铅的标准曲线相关系数为0.9994,相时标准偏差在0.32%～2.17%,加标回收率在95%～104%,检出限为1.454μg/L.[结论]用微波消解作为预处理手段,以石墨炉原子吸收分光光度法测豆腐花中铅的含量是一种可行的方法,具有精密度高、准确度好等优点.     

粉葛中微量元素含量的测定

[目的]测定粉葛样品中微量元素的含量.[方法]采用火焰原子吸收光谱法测定7种粉葛中Mg、Fe、Mn和Zn4种微量元素的含量.[结果]粉葛样品富含Mg、Fe、Mn和Zn元素;不同产地不同品种粉葛的微量元素含量差异明显,即使同一产地不同品种粉葛的微量元素含量也有差异.[结论]该研究可为粉葛资源的进一步开发利用提供参考.     

珍珠粉中微量元素测定

[目的]对同仁堂牌珍珠粉中几种微量元素的含量进行测定,为进一步研究珍珠粉的保健作用提供参考.[方法]利用原子吸收光谱法测定Ca及Zn、Na、Fe、Mg、Cu、Mn、Sr 7种微量元素的含量.[结果]同仁堂牌珍珠粉中Ca、Zn、Na、Fe、Mg、Cu、Mn、Sr的含量分别为377 084.00、6.46、98.86、170.88、8.34、5.46、589.78、268.66 μg/g.[结论]同仁堂牌珍珠粉中Ca的含量较高,是其主要成分,Mn、Sr、Fe、Na的含量也较为丰富,而Zn、Mg、Cu的含量较少.     

凯里地区槐花中微量元素含量的测定

[目的]测定凯里地区槐花样品中微量元素的含量.[方法]采用微波消解-火焰原子吸收光谱法测定本地药食两用槐花中K、Ca、Zn、Fe、Pb和Cd 6种微量元素的含量.[结果]凯里下司地区的槐花含有丰富的人体必需微量元素K、Ca、Zn和Fe,且含量分布为:Fe>Ca>K>Zn;未检出有害元素Cd和Pb.所测元素回收率为94.1%～110.0%,RSD值为0.54%～1.73%.[结论]该研究可为当地槐花的药用价值提供科学的评价依据.     

难溶高碳合金钢消解方法的探讨

采用盐酸和硝酸并利用微波消解法完全消解难溶高碳合金钢,使用电感耦合等离子体原子发射光谱法(ICP-AES)测定其中的主要合金元素含量。试验对消解方法、消解试剂的选择及用量、水用量对高硅样品消解的影响、微波消解程序等进行了探讨。最终确立了最佳消解条件为:称取0.2g样品,依次加入10.0mL水、5.0mL盐酸、5.0mL硝酸,在目标温度达到180℃条件下进行微波消解处理。而对于硅质量分数在1.0%以上的高硅难溶高碳合金钢样品,应适当增加水用量。按照实验方法处理多个难溶高碳合金钢样品,并采用ICP-AES测定其中的主要合金元素Si、Mn、Ni、Cr、Mo、V,结果的相对标准偏差(RSD,n=8)为0.23%~4.7%;按照实验方法处理4个难溶高碳合金钢标准样品,并使用ICP-AES测定Si、Mn、Ni、Cr、Mo、V,测定结果与认定值相吻合。     

Laudatio: Prof. Dr. med. Dr. phil. Dres. h. c. Heinz H?fner

During the course of a year, there are many healthcare workers nationwide who sustain sharps injuries whilst carrying out their duties. Staff who work in the Accident and Emergency (A & E) units are no different from anyone else in this respect. The emotional cost of such an accident cannot be calculated, whereas the financial costs can. This article aims to show how the cost of an injury to a member of staff can be calculated, thus allowing a manager to assess the financial implications of sharps injuries to their department. In the absence of access to an Occupational Health (OH) department, most A & E units have to respond to sharps injuries to healthcare workers in the hospital. This task must be attended to by the medical staff as well as the nursing staff of the A & E unit. Within the following text the appropriate responses and methods to ensure uniformity of response are discussed. The tables and the calculation figures shown are taken directly from the information held in the St James's University Hospital Trust's OH department. All calculations are based on the middle band of the salary scale for each discipline. Accurate costings for each member of staff injured cannot be shown in this article, but the general principle is laid down and can be easily followed for any situation.     

1969 C.P.A. Institute.

Presents the program for the C.P.A. Institute entitled "The Role of Counseling Services on the Contemporary Campus." The Institute was held on June 2-3, 1969. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The blood-brain barrier. I. Histology. Physiology. Embryology. Transport

The concept of blood-brain barrier (bbb) arose in the beginning of the 20th century after report that the dyes injected intravenously did not appear in the brain. The idea and definition of bbb has been changed many times since then. We present current opinion concerning bbb, its histology, embryology, ultrastructure and function on the ground of a review of the recent literature.     

Rats, Man . . .

Comments on the article by Richter entitled "Rats, Man, and the Welfare State" (see record 1960-02810-001). The commenter notes that in his article Richter did not indicate how hereditary and environmental factors were controlled. In comparing the hereditary survival characteristics of wild versus domesticated rats, it would be essential that the environmental influences on the survival characteristics of the wild rats should be ruled out. Another factor to be considered is that the wild state may offer a diet and other environmental influences, which in the life of a single individual would produce organic changes, accounting for some of the differences between wild and domestic rats. It would seem that the most effective way to determine the hereditary differences between wild and domestic rats would be to create a wild group, composed solely of the offspring of wild rats. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

C.A.T. scans

With the rapidly mounting cost of medical care in hospitals, physicians must seek alternative forms of therapy for illnesses that could conceivably be treated by less confining methods. One appraoch to this problem is the Psoriasis Day Care Center, where psoriasis patients with extensive disease are treated during the day and allowed to return home at night. The advantages include reduced cost, accessibility for more patients, and superior therapeutic results. This day care center concept could be equally applicable to other diseases now routinely treated by complete hospitalization.