高明市2389名0—6岁儿童锌,铁,铜,钙缺乏状况调查

调查了高明市２３８９名０￣６岁儿童锌、铁、铜、钙缺乏状况。结果表明，本市儿童缺锌、铜、铁和钙各为４５．９２％，６０．２０％，１３．４４％和４．６０％。讨论了缺锌、铜、铁的原因。     

中山地区厌食儿与发锌,铁,铜,钙的相关性临床研究——附387例分析

对中山地区厌食儿２２２例的发锌、铁、铜、钙含量进行测定，并与１６５例健康儿对照分析。结果表明：厌食儿组发锌均值比健康儿组明显偏低，铜／锌均值明显偏高，Ｐ均〈０．０１；发钙偏低，Ｐ〈０．０５；发铁、发铜无明显差异，Ｐ〉０．０５。厌食儿组发锌下降率为９６．３６％，健康儿组为１３．３３％，两组间存在高度显著性差异，Ｐ〈０．０１。说明厌食儿体内微量元素变化以锌最明显。另外对２２２例厌食儿中的１５１例缺锌儿     

冠心病患者全血微量元素锌、铜、铁的分析

用原子吸收法测定５０例健康人、５２例冠心病患者全血微量元素锌、铜、铁的含量，并对５２例冠心病患者全血微量元素锌、铜、铁的含量及锌／铜比值，与其血脂总胆固醇（ＣＨ）、甘油三酯（ＴＧ）、高密度脂蛋白（ＨＤＬ）、低密度脂蛋白（ＬＤＬ）的浓度分别作线性相关分析。结果表明：（１）冠心病患者全血锌、铁、锌／铜比值均高于健康人（Ｐ＜０．０５），全血铜低于健康人（Ｐ＜０．０５）。（２）全血锌与ＨＤＬ呈负相关（Ｐ＜０．０１）、锌／铜比值与总胆固醇呈正相关（Ｐ＜０．０５），铁与ＬＤＬ呈正相关（Ｐ＜０．０１）．提示锌／铜比值增高及体内铁储存增加均可能是冠心病易患因素．     

糖尿病患者治疗前后血细胞内液和血浆锌、铜、铁、镁和铷含量的研究

采用原子吸收分光光度计对６４名糖尿病患者血细胞内液和血浆中锌、铜、铁、镁、铷含量进行了测定．结果发现糖尿病组血细胞内液锌含量显著低于正常对照组（Ｐ＜０．０１），血细胞内液铁含量亦显著低于正常对照组（Ｐ＜０．０１），血浆铜含量显著高于正常对照组（Ｐ＜０．０１）．提示糖尿病患者锌、铁、铜的代谢方面均存在一定缺陷，认为糖尿病患者补充锌、铁元素，可能对治病有益处．     

小儿甲型肝炎早期血清锌、铜、铁、镁含量变化的探讨

通过对９８例甲型肝炎早期住院患儿血清锌、铜、铁、镁含量的检测，显示在小儿甲型肝炎早期，血清锌、镁含量与对照组无显著差异（Ｐ＞０．０５），血清铜、铁含量明显增高，与对照组存在非常显著差异（Ｐ＜０．０１）．文章对甲型肝炎患儿血清锌、铜、铁含量的变化和临床意义进行了探讨．     

缺铁性贫血患儿血清铁,铜,锌水平与血红蛋白浓度的相关分析

观察了缺铁性贫血患儿血清铁，铜，锌的水平，并对其相互关系及与血红蛋白浓度的相关性进行了分析，结果发现，体内铁，锌代谢密切相关，血清铁，锌呈一致性降低，相关系数为０．４９３２（Ｐ〈０．０００５）；血清铁，锌与血红蛋白浓度经单侧相关分析亦呈显著性正相关，相关系数分别为０．７１９５，０．７４５０，Ｐ值均小于０．０００５。     

示波极谱法连续测定食品中微量锌铁锰铜铅镉砷

研究了三乙醇胺－乙二胺－硫氰酸钾－乙酸－碘经钾－盐酸－酒石酸锑钾体系示波极谱法在同一份食品试样中连续测定七种微量元素。在该体系中,七种微量元素可分别产生稳定的极谱二阶导数波,空白无峰出现。锌、铁、锰、铜、铅检出限为０．０ｍｇ．ｋｇ＾－１,砷、镉检出限为０．００５ｍｇ．ｋｇ＾－１。锌、铁、铜、铅０．０１～０．８０μｇ．ｍｌ＾－１,镉０．００５～０．８０μｇ．ｍｌ＾－１,锰０．０１～０．５０μｇ．ｍｌ     

反相高效液相色谱法测定新药阿司匹林铜

提出测定阿司匹林铜新药的反相高效液相色谱分析方法,采用国产ＹＷＱ Ｃ１８柱,在２５℃下,甲醇：水（含０．０８％正磷酸）：丙酮＝１１．４：８．６：１．１为流动相,苯甲酸为内标,药用标准阿司匹林和水杨酸为对照品,在ＵＶ－２３５ｎｍ下检测阿司匹林铜和杂质水杨酸铜的含量;阿司匹林铜,水杨酸铜的检出限分别为０．８７ｍｇ／Ｌ,２．４６ｍｇ／Ｌ;阿司匹林铜的回收率为９９．０％－１００．５０％;水杨酸铜的回收率为     

烧伤病人血和尿中微量元素的相互关系与变化

测定了烧伤病人及健康成人血和尿中锌、铜、铁、锰、铬的含量。经两两比较，结果表明烧伤病人及其补充微量元素后血锌与铜之间未发生明显变化，Ｐ〉０．０５；而尿锌与铁、锰、铬之间发生变化，Ｐ〈０．０１。     

糖尿病患者血清中微量元素分析

对２０例糖尿病患者血清锌、铁、锰、钙、铜含量检测发现，糖尿病组较对照组血清铁、铜高，差异显著（Ｐ〈０．０５），血清锌、锰略低（Ｐ〉０．０５），血清钙略高（Ｐ〉０．０５）。表明糖尿病可导致微量元素代谢紊乱，在治疗糖尿病时要适当补充微量元素；同时微量元素含量可作为糖尿病的一个控制指标。     

Sequential determination of trace amounts of iron and copper in water samples by flow injection analysis with catalytic spectrophotometric detection.

A simple flow injection analysis (FIA) method is described for the sequential determination of iron and copper. The detection method for iron and copper is based on their catalytic activities in the oxidation reaction of N,N-dimethyl-p-phenylenediamine (DPD) with hydrogen peroxide. The sequential determination of iron and copper can be carried out by injecting two sample plugs into the FIA system, sequentially. One injection does not contain triethylenetetramine (TETA), and is used for the sum of iron and copper concentration; the other which contains TETA is used only for the iron concentration. For iron determination, TETA is used as a masking agent of copper. The difference in peak height can be used for the calculation of copper concentration. Under the optimal conditions, the detection limits (3sigma) of 0.01 and 0.07 microg L(-1) were obtained for iron and copper, respectively. The proposed method can be applied to the determination of iron and copper in tap water and bottled-drinking mineral water samples. Good recoveries of the method, 98-103% for iron and 98-106% for copper, were achieved.     

重铬酸钾滴定法测定废杂铜中的铁含量

研究了废杂铜中铁含量的测定方法。试料采用盐酸、硝酸、高氯酸溶解,加入过量氨水生成氢氧化铁沉淀与铜、铬等干扰元素分离,沉淀用热盐酸溶解后,用氯化亚锡还原至溶液呈浅黄色,重铬酸钾滴定法测定铁含量。探讨了溶样方式、氯化铵用量、氨水过量的体积、硫磷混酸用量对测定结果的影响。对4个废杂铜样品中的铁含量进行测定,测定结果的相对标准偏差RSD(n=11)为0.38%～0.95%,加标回收率为99.4%～100%,方法准确可靠,能够满足测定要求。     

选矿废水中铜铁含量连续滴定

本文针对选矿废水中的铜离子和铁离子,在滴定铜离子含量的基础上,向滴定液中继续加入三氯化铝溶液作为解蔽剂将铁离子解蔽,此时溶液呈深棕色,以硫代硫酸钠标准溶液继续滴定铁,溶液深棕色消失转为奶白色即为滴定终点,本法避免了单独滴定铜铁含量的麻烦,且在滴定铁离子含量时无需除铜。经实验验证,应用本法对选矿废水中铁含量进行滴定与重铬酸钾滴定铁含量的结果一致,相对误差小于2.03%,加标回收率在95.80%-101.9%之间,相对标准偏差(RSD,n=10)在0.48%-1.52%之间。本方法精密度高,重现性好,简便快捷,可以满足选矿废水中铜、铁含量的滴定要求。     

火焰原子吸收法测定竹荪中的微量元素

使用灰化法处理样品,火焰原子吸收光谱法测定了竹荪中的钾、钙、钠、镁、铁、锰、铜、锌的含量。结果显示,竹荪中含有丰富的铁、锰、铜、锌4种人体必需微量元素。加标回收率为93.2%~103.2%,该法测定快速、简单,结果满意。     

碘量法连续测定选矿废水中的铜铁

针对选矿废水中的铜离子和铁离子,在滴定铜离子含量的基础上,向滴定液中继续加入三氯化铝溶液作为解蔽剂将铁离子解蔽,此时溶液呈深棕色,以硫代硫酸钠标准溶液继续滴定铁,溶液深棕色消失转为奶白色即为滴定终点,避免了单独滴定铜铁含量的麻烦,且在滴定铁离子含量时无需除铜。经实验验证,对选矿废水中铁含量进行滴定与重铬酸钾滴定铁含量的结果一致,相对误差小于2.03%,加标回收率在95.8%~101.9%,相对标准偏差(RSD,n=10)在0.48%~1.5%。方法精密度高,重现性好,简便快捷,可以满足选矿废水中铜、铁含量的测定要求。     

火焰原子吸收光谱法测定重晶石中锌铜铁

提出了火焰原子吸收光谱法测定重晶石中锌、铜和铁的方法 ,相对标准偏差为 1 .7%～7.3% ,加标回收率在 95.2 %～ 1 0 3.2 %之间。特征浓度锌为 0 .0 1 0 μg·ml-1/1 % ,铜为 0 .0 35μg·ml-1/1 % ,铁为 0 .0 67μg· ml-1/1 %。方法简便、准确、可靠。     

5-Br-PADAP-Triton X-100分光光度法连续测定血清中铜和铁

建立了一种快速、灵敏、连续测定血清中铜和铁含量的分光光度法。铜、铁与5-Br-PADAP及TritonX-100在pH 4.0缓冲溶液中生成红色配合物,测定吸光度（A1）,加入掩蔽剂后再测定吸光度（A2）,A2值与铁离子浓度成正比,吸光度下降值（△A = A2-A1）与铜离子浓度正比。铜、铁配合物表观摩尔吸收系数分别为6.44×104、6.53×104 L*mol-1*cm -1,铜、铁含量分别在0～80、0～70 μmo1*L-1 范围内性线良好,变异系数分别为2.7%、2.2%,平均回收率为100.8%、100.7%; 铜、铁含量测定分别与双环己酮草酰二腙法、亚铁嗪法相比较,无显著性差异（P＞0.05）。     

Successive determination of copper and iron by a flow injection-catalytic photometric method using a serial flow cell.

A flow injection-catalytic spectrophotometric method using a serial flow cell was proposed for the successive determination of trace amounts of copper and iron. This method is based on the oxidation coupling of p-anisidine with N,N-dimethylaniline in the presence of hydrogen peroxide to form a dye, which has an absorption maximum at 740 nm. In this indicator reaction, ligands such as 1,10-phenanthroline (phen) and diphosphate were achieved to improve the sensitivity and selectivity. Under the optimal experimental conditions, the determinable ranges were 0.05-5 ppb for copper and 0.5 - 100 ppb for iron, respectively. The RSDs (n = 10) were 0.78% for 0.5 ppb copper(II) and 0.5% for 200 ppb iron(III). The sample throughput was 30 h(-1). The present flow-injection method was applied to the determination of copper and iron in standard river water, tap water, and other natural water samples, and also to the analysis of labile and inert complexes in synthesized samples containing humic acid with copper(II) or iron(III).     

A rapid titrimetric determination of iron in copper concentrates and copper-bearing leach solutions

A titrimetric method for the determination of iron(III) in the presence of copper is presented. This method involves the reduction of iron(III) with titanous sulphate followed by titration with dichromate. It has been successfully used for the determination of iron in both leach solutions and copper concentrates with a relative error of 1%.     

Utilization of activating and masking effects by ligands for highly selective catalytic spectrophotometric determination of copper and iron in natural waters

A kinetic–catalytic spectrophotometric method is proposed for the successive determination of nanogram levels of copper and iron, which is based on their catalytic effects on the oxidative coupling of p-anisidine with N,N-dimethylaniline (DMA) to form a colored compound (λ_max=740 nm) in the presence of hydrogen peroxide at pH 3.2. 2,9-Dimethyl-1,10-phenanthroline (neocuproine) acted as an activator for the copper catalysis, and 1,10-phenanthroline (phen) acted as an activator for the iron catalysis. The selectivity was improved in the presence of diphosphate as a masking agent. The determinable ranges were 0.16–10 ppb for copper and 1–100 ppb for iron, respectively. The relative standard deviations of copper and iron were 1.1 and 0.97% for five determinations of 10 ppb copper and 40 ppb iron. The method was successfully applied to the analyses of copper and iron in tap, well, river and pond waters.