常、微量元素与胎儿宫内发育迟缓关系的研究

目的 探讨常、微量元素与胎儿宫内发育迟缓(IUGR)间的关系.方法 孕晚期测定71名孕妇母血、脐血、羊水中微量元素水平,其中IUGR组21例,对照组35例,巨大儿组15例.结果 IUGR组母血清Zn,Se,Mn,Fe,Mg,Cr明显低于对照组(P＜0.05);Cd,Pb,Ni水平明显高于对照组;巨大儿组母血清Fe含量亦明显低于对照组(P＜0.05);三组间Ca,Ti,Co,Li无明显差别.IUGR组脐血清Se,Mn,Cd,Fe,Cu,Mg明显低于对照组;Pb,Ni明显高于对照组;三组间Zn,Ca,Ti,Co,Li无明显差别.IUGR组羊水Zn,Se,Mn,Fe明显低于对照组,三组间Ca,Co无明显差别.结论 常、微量元素与胎儿发育关系密切,Zn,Se,Mn,Fe,Mg,Cu,Cr缺乏可致胎儿宫内发育迟缓,Cd,Pb,Ni升高可致低体重儿.     

白族药野坝子的微量元素分析

用原子吸收分光光度法 (AAS)测定白族药野坝子的 Cu、Zn、Fe、Mn、Ca、Se、Ge、Ni、Co、Cd、Sr、Ba、Li、Mo、Si、Pb、Cr、Al的含量 ,发现野坝子中除含人体必需的多种微量元素外 ,还富含 Cu、Zn、Fe、Mn、Se,这为进一步研究和综合开发利用这一民族药提供了依据     

上海地区7～20岁人群血清微量元素研究

作者检测了上海地区417名7～20岁人群的血清17种微量元素(包括12种必需微量元素)和3种常量元素的含量。其中血清Zn、Cu、Fe、Mn、Cr、Co、Mo、Si、Sn、Ni、V、Ca、P、Mg、Sr、Cd、Pb、Al、Ti共19种元素采用ICAP-9000型等离子体直读光谱仪测定,血清Se由F-78型脉冲极谱仪分析。结果表明,血清Zn、Cu及常量元素等分布比较集中,Cd、Pb、Co、Sr等变异度较大。多数元素与年龄存在相关关系,其中Zn、Fe、Mn、Sr等与年龄呈正相关,Cu、Se、Cr、Pb等则随年龄增长而下降。不同生长发育时期血清多数元素有明显差别,整个人群血清各元素男女间基本一致,但不同时期血清元素有一定性别差异。比较不同地区血清元素的分布,表明市区人群血清Cr、Si、Pb等元素较高,而市郊Cu、Fe、Mn、Sr值较高。     

原子吸收分光光度法测定赣产白术中微量元素

用原子吸收光度法测定白术中Zn、Fe、Cu、Mg、Cr、Mn、Pb、Cd、K、Ni、Co共11种元素的含量。其中Mg、K是人体的常量元素,Cu、Fe、Zn、Cr、Mn、Co、Ni是人体的必需微量元素,Pb、Cd是人体的非必需微量元素。结果表明,白术含有很多与人体密切相关的元素,具有较高的药用价值。     

饮食治疗苯丙酮尿症患儿全血钙及微量元素水平分析

【目的】　探讨低苯丙氨酸饮食对苯丙酮尿症 ( phenylketonuria ,PKU)患儿血钙 (Ca)及微量元素铁、铜、锌、硒、铬、锰、镉、铅、碘 (Fe、Cu、Zn、Se、Cr、Mn、Cd、Pb、I)的影响。　【方法】　采用电感耦合等离子体质谱仪 (ICP MS)对 3 2例PKU患儿全血钙及微量元素进行测定 ,并以 46名正常儿童的全血水平作为正常值对照。　【结果】　PKU患儿全血Ca及微量元素Fe、Zn、Se、Cr、Mn、Pb、I明显低于正常儿童对照组 (P <0 .0 5 ) ,血Cu、Cd与对照组相比差异无显著性 (P >0 .0 5 )。　【结论】　对低苯丙氨酸 (Phe)饮食治疗的PKU患儿有必要检测血钙和微量元素水平 ,并及时补充以纠正低苯丙氨酸饮食治疗过程中这些元素的摄入不足 ,保证患儿得到全面营养     

血微量元素缺乏与儿童反复呼吸道感染的相关性

目的:分析血微量元素缺乏与反复呼吸道感染(RRTI)的相关性.方法:选取我院2016-01～2019-09期间收治的RRTI患儿241例作为研究组,另选取同期健康体检儿童210例作为对照组,统计对比两组血清微量元素[铜(Cu)、铅(Pb)、镁(Mg)、钙(Ca)、铁(Fe)、锌(Zn)]水平,并分析其与RRTI关联性....     

竹叶中7种微量元素的测定

硝酸—高氯酸(4:1)混酸分解竹叶样品,原子吸收光谱法测定竹叶中的Cu、Fe、Zn、Ni、Pb、Cd、Cr等7种微量元素,并比较了不同地区的竹叶中微量元素的含量。结果表明,竹叶中7种微量元素含量差异显著,其中Cu、Fe和Zn的含量较高,Ni、Pb次之,Cd和Cr最低,可为竹叶的质量评价提供参考依据。     

ICP—MS法测定不同产地莪术中微量元素的含量研究

采用微波消解—电感耦合等离子质谱技术(ICP-MS)对不同产地莪术的28种微量元素含量进行了测定。结果表明:不同产地莪术药材中均含有Li、Hg、Be、Mg、Pb、K、V、Ca、Cu、Ti、As、Cr、Mn、Ba、Fe、Tl、Ni、Zn、Ga、Sb、Na、Sr、Cd、Al等元素。不同产地莪术中微量元素含量存在差异,K、Ca、Mg、Mn、Fe、Al、Zn等元素的含量较高,具有一定的药用价值,为合理用药和开发利用中药莪术植物资源提供参考。     

336例健康儿童全血微量元素含量相关性研究

目的:探讨儿童全血中微量元素含量以及各元素间相互协同或拮抗作用。方法:采用原子吸收光谱仪,测定336名1～3岁儿童全血中的铅(Pb)、镉(Cd)、铜(Cu)、锌(Zn)、钙(Ca)、镁(Mg)和铁(Fe)含量,并分析各元素间的相互关系。结果:全血微量元素Zn含量较正常值偏低,Pb含量偏高。Ca与Pb、Zn、Cd呈负相关,Fe与Cu、Zn、Ca呈负相关,Pb与Cd呈正相关。结论:儿童期应均衡饮食,合理补充微量元素,以保证儿童健康成长。     

电感耦合等离子体光谱法测定芜菁中微量元素的含量

目的:了解微量元素含量与中药药效的关系。建立一种电感耦合等离子体发射光谱法(ICP—AES)测定芜菁中微量元素含量的方法。方法:采用等离子体发射光谱法(ICP—AES)和原子吸收法测定了芜菁中微量元素的含量。结果:芜菁中含有Al,B,Ba,Be,Ca,Co,Cr,Cu,Fe,Li,Mg,Mn,Ni,P,Sr,Ti,V,Zn,Pb等19种元素。P,Mg,Fe,Sr,B,Cr,Zn,Mn等元素的含量较高。回收率为93.6%~106.0%。结论:等离子体发射光谱法(ICP—AES)具有检出限低、准确度高、线性范围宽的优点,可同时测定芜菁中的多种元素。     

Heavy-Metal Levels in Feathers of Cattle Egret and Their Surrounding Environment: A Case of the Punjab Province, Pakistan

Levels of 10 heavy metals in cattle egret chick feathers, prey, and surrounding soils from three heronries in Punjab Province, Pakistan, were assessed by atomic absorption spectrophotometry. Mean levels of cadmium (Cd), iron (Fe), chromium (Cr), and lithium (Li) in feathers, manganese (Mn), cobalt (Co), and nickel (Ni) in prey, and lead (Pb), iron (Fe), chromium (Cr), zinc (Zn), cobalt (Co), and lithium (Li) in soils were significantly different among Trimun Headworks, Shorkot, and Mailsi heroneries. Mean levels of Pb (43.10 μg/g), Cr (35.77 μg/g), Co (18.34 μg/g), Cu (0.20 μg/g), and Ni (0.22 μg/g) in feathers were significantly greater at Mailsi, and Mn (3.07 μg/g), Zn (18.83 μg/g), and Li (1.5 μg/g) levels were significantly greater at Shorkot. Multivariate analysis identified that some metals, such as Fe, Zn, and Li, in feathers were either associated with natural sources or with human-related activities, whereas Ni, Cr, Pb, Cd, Cu, Co, and Mn were correlated mainly with anthropogenic processes. Alarming levels were recorded for Cr, Pb, and Cd in feathers that were above threshold levels that may affect cattle egret flighting capacity and reproduction, thus leading to their population decline in Punjab Province. The results of this study provide evidence for the potential of feathers of cattle egret to be used as a biomonitor for the local heavy-metal contamination.     

Determination of mineral contents of Turkish herbal tea (Salvia aucheri var. canescens) at different infusion periods

Inductively coupled plasma atomic emission spectrometry has been used for the determination of contents of major and minor elements in Salvia aucheri var. canescens (sage) and its infusions for different intervals. Twenty-five elements (Al, B, Ba, Bi, Ca, Cd, Co, Cr, Cu, Fe, Ga, Ln, K, Li, Mg, Mn, Na, Ni, P, Pb, S, Sr, Ti,V, and Zn) were detected in both S. aucheri and its infusions. The ranges of mineral levels varied from Cd (1.6668 mg/kg) to K (13,570 mg/kg) and Ni (0.05273 mg/kg) to K (196.25 mg/kg) in the herb and its infusions, respectively. The levels of K, Ca, Na, Mg, and S in all infusions in this work were higher than those of the other elements. However, Al, Ba, Ca, Cd, Co, Cu, Fe, Li, K, Mg, Na, Ni, P, Pb, Sr, Ti, and Zn contents were high in the first period of infusion. As a result, the first period of infusion may be proposed as the optimum infusion time because of nutritional properties. These results may be useful for the evaluation of dietary information.     

Assessment of reference values for selected elements in a healthy urban population

Reference values for 26 elements, namely Al, Ba, Be, Bi, Ca, Cd, Co, Cr, Cu, Fe, Hg, Li, Mg, Mn, Mo, Ni, Pb, Sb, Si, Sn, Sr, Tl, V, W, Zn and Zr are proposed in serum and blood of 110 healthy adults of the urban area of Rome. They were included in the study on the basis of strict criteria of eligibility and exclusion. With the exception of Ba, Bi, Co, Cr, Ni, Sb, Sn Tl in serum, and Bi, Hg, Si, V and W in whole blood, experimental data for each all the other analytes were found to approach a normal distribution. The estimated 5-95% references ranges (in ng ml(-1)) were reported. For several elements the reference ranges observed overlapped information available in the literature. Gender, age, body mass index, smoking habits and alcohol consume were used as grouping variables. Mutual associations were observed for several elements, as follows: Be, Ca, Co, Cr, Cu, Li, Mo, Pb and Zn with sex; Ca, Pb and Si with age (< and > 45 years); Co, Cr, Mo, Sb and Tl with body mass index; Cd and Pb with smoking habit; Cr and Pb with alcohol consume.     

Metals and oxidative stress in patients with Parkinson's disease

Twenty-six metals and the oxidative status in 71 patients affected by Parkinson's disease and 44 healthy individuals were compared in order to identify potential biomarkers of the disease. In the patients, the following significant imbalances were found (p < or = 0.05): i) in serum, an increment of Ca, Mg, Ni, Si and V, and a decrement of Cd, Co, Fe, Li, Sn, Zn and Zr; ii) in blood, raised levels of Co, Li, Ni and Si and decreased of Al, Be, Ca, Cd, Fe, Mg, Mo, Sn, Zn and Zr; iii) increased formation of oxidant species and lowered anti-oxidant capacity (p < or = 0.001 for both). Barium, Bi, Cr, Cu, Hg, Mn, Pb, Sb, Sr, Tl and W did not change with the disease. The best discriminating variables between patients and controls were Cd, Co, Fe, Ni and Si in serum (91.2% of cases correctly classified), and Al, Cd, Co, Fe, Mo and Si in blood (98.2% of cases properly classified).     

Quantification of chemical elements in blood of patients affected by multiple sclerosis

Although some studies suggested a link between exposure to trace elements and development of multiple sclerosis (MS), clear information on their role in the aetiology of MS is still lacking. In this study the concentrations of Al, Ba, Be, Bi, Ca, Cd, Co, Cr, Cu, Fe, Hg, Li, Mg, Mn, Mo, Ni, Pb, Sb, Si, Sn, Sr, Tl, V, W, Zn and Zr were determined in the blood of 60 patients with MS and 60 controls. Quantifications were performed by inductively coupled plasma (ICP) atomic emission spectrometry and sector field ICP mass spectrometry. When the two groups were compared, an increased level of Co, Cu and Ni and a decrement of Be, Fe, Hg, Mg, Mo, Pb and Zn in blood of patients were observed. In addition, the discriminant analysis pointed out that Cu, Be, Hg, Co and Mo were able to discriminate between MS patients and controls (92.5% of cases correctly classified).     

Temporal Variation of Trace Elements in Waters Polluted by Municipal Solid Waste Landfill Leachate

Landfill leachate-polluted stream waters were monitored in three sampling campaigns (November 2001 to June 2006), with emphasis on trace elements. The data were evaluated by means of statistics and speciation modelling. Two statistically different groups of trace elements were distinguished: (1) Ba, Sr, Al, Fe, Mn, Cr, Co, Ni, V, As, Se, Sb, U, Li, Rb and Cs decrease during the rain event due to dilution; (2) Pb, Zn, Cu and Cd increase during the rain event due to the dissolution of hydrous ferric oxides and calcite, on whose surfaces these elements are bound, mainly in the stream sediments downgradient to the landfill.