共查询到20条相似文献,搜索用时 46 毫秒
1.
H. S. Dang H. B. Desai D. D. Jaiswal S. R. Kayasth S. Somasundaram 《Journal of Radioanalytical and Nuclear Chemistry》1983,77(1):65-70
A simple separation scheme for the analysis of As, Mn, Mo, Cu and Zn using neutron activation is described. It has been checked
using three standard reference materials, A-11 milk powder (IAEA) and bovine liver and orchard leaves (USNBS) and found to
give acceptable results. This scheme was applied for determination of these trace elements in mature human milk samples. The
concentrations of As, Mn, Mo, Cu in samples obtained from two socio-economic groups—low and middle incomes—were not significantly
different. However, Zn levels in samples obtained from the poor income group were significantly lower than in those obtained
from the other group.
Work carried out under Research Contract No. 2598/RB of International Atomic Energy, Vienna.
Health Physics Division.
Analytical Chemistry Division. 相似文献
2.
Regional distributions of manganese,iron, copper,and zinc in the brains of 6-hydroxydopamine-induced parkinsonian rats 总被引:1,自引:0,他引:1
Tarohda T Ishida Y Kawai K Yamamoto M Amano R 《Analytical and bioanalytical chemistry》2005,383(2):224-234
Time courses of changes in manganese, iron, copper, and zinc concentrations were examined in regions of the brain of a 6-hydroxydopamine
(6-OHDA)-induced rat model of Parkinson’s disease using inductively coupled plasma mass spectrometry (ICP-MS). The concentrations
were simultaneously determined in brain section at the level of the substantia nigra 1, 3, 7, 10, 14, and 21 days after the
6-OHDA treatment and compared with those of control rats. The distributions of these elements were obtained for 18 regions
of the sagittal section (1-mm thick). The ICP-MS results indicated that Mn, Fe, Cu, and Zn levels of the 6-OHDA-induced parkinsonian
brain were observed to increase in all regions that lay along the dopaminergic pathway. In the substantia nigra, the increase
in Mn level occurred rapidly from 3 to 7 days and preceded those in the other elements, reaching a plateau in the 6-OHDA brain.
Iron and Zn levels increased gradually until 7 days and then increased rapidly from 7 to 10 days. The increase in the copper
level was slightly delayed. In other regions, such as the globus pallidus, putamen, and amygdala, the levels of Mn, Fe, Cu,
and Zn increased with time after 6-OHDA treatment, although the time courses of their changes were region-specific. These
findings contribute to our understanding of the roles of Mn and Fe in the induction of neurological symptoms and progressive
loss of dopaminergic neurons in the development of Parkinson’s disease. Manganese may hold the key to disturbing cellular
Fe homeostasis and accelerating Fe levels, which play the most important role in the development of Parkinson’s disease. 相似文献
3.
The uptake of Cr, Mn, Ni, Cu, Zn, Cd and Pb in soft tissue of Perna perna mussels and their shells has been studied in aquarium experiments in which mussels were exposed for 30 or 60 days to seawater
spiked with different concentrations of these contaminants (125 and 500 μg L−1). Tissue samples were analyzed after acid digestion by conventional solution nebulization ICP–MS. Laser ablation ICP–MS was
used for the quantitative determination of trace elements in different areas of the corresponding shells. With the exception
of Mn and Zn, all other elements studied showed a significant concentration enhancements in soft tissue, with the magnitude
of this enhancement following the order: Cr > Ni > Cd > Cu > Pb. A corresponding increase in most contaminants, although less
pronounced, was also observed in the newly formed growth rings of mussel shells, contributing to the validation of Perna perna mussel shell as a bioindicator of toxic elements. 相似文献
4.
S. Waheed N. Siddique M. Arif I. Fatima N. Khalid S. Rahman M. Daud M. Wasim 《Journal of Radioanalytical and Nuclear Chemistry》2008,277(3):539-548
This paper presents the results of the proficiency test exercise conducted in Pakistan for the determination of trace elements
in mushroom reference material. Thirteen laboratories from different organizations of the country submitted trace elemental
data on Al, As, Br, Ca, Cd, Ce, Cl, Co, Cr, Cs, Cu, Fe, Hg, K, Li, Mg, Mn, Na, P, Pb, Rb Sc, Si, Sm, Sr, Th, Zn. Results for
Al, As, Br, Ca, Cd, Cl, Co, Cr, Cs, Cu, Fe, K, Mg, Mn, Na, Rb Sc, and Zn, in the mushroom material were reported by two or
more participating laboratories and could be subjected to statistical evaluation. The original data of these trace elements
was subjected to a computer program “Histo Version 2.1” provided by IAEA. The four outlier tests, i.e., Dixon, Grubbs, skewness
and kurtosis were applied to the data sets. Consensus (overall) mean values, absolute standard deviation, relative standard
deviation, standard error, median and range of values for these elements have been reported at a significance level of 0.05. 相似文献
5.
Sodium diethyldithiocarbamate in the presence of a weak oxidizing agent is used as a co-precipitative agent for the pre-concentration of Se, Cu, Pb, Zn, Fe, Co, Ni, Mn, Cr and Cd. A procedure was developed for ICP-AES determination of these elements after pre-concentration in river and waste water (an enrichment factor of 40). The recovery of all the elements tested for was more than 98%. The limits of determination (mg l−1) (10 S.D. blank) are 0.001 (Cu, Co, Cr, Mn), 0.0007 (Zn, Cd), 0.003 (Se), 0.004 (Fe), 0.007 (Ni), and 0.01 (Pb). 相似文献
6.
N. Siddique A. Majid M. M. Chaudhry M. Tufail 《Journal of Radioanalytical and Nuclear Chemistry》2012,292(1):219-227
The elements Cd, Cr, Cu, Mn, Ni, Pb and Zn were determined in dust samples collected from air conditioner (AC) filters from
15 commercial sites of Lahore using flame atomic absorption spectroscopy (FAAS). The elements Cr, Mn and Zn were also determined
using instrumental neutron activation analysis (INAA). The results obtained showed that higher amounts of these metals were
measured in these dust samples than normally found in soil. This was especially true for Cd, Cu, Pb and Zn. Generally the
amounts of Cd, Cr and Mn did not vary throughout the city of Lahore but the amounts of the traffic related Cu, Pb and Zn elements
had the more variable ranges of 30–140, 30–230 and 74–2810 mg/kg respectively. The concentrations obtained for Cr, Mn and
Zn by INAA were found to be higher than those obtained using FAAS. Analysis of the data obtained showed the digestion procedure
employed to be the possible cause for this occurrence. It was also found that Mn was being over-estimated by INAA due to the
interference from the Mg peak. 相似文献
7.
H. Dilara Kiliç Seda Deveci Koray B. Dönmez Ebru Çetinkaya Sevinç Karadağ Mustafa Doğu 《International journal of environmental analytical chemistry》2018,98(4):308-322
Determination of copper (Cu), zinc (Zn) and manganese (Mn) micronutrients in soil samples have been studied for an efficient fertiliser application. Plant-available micronutrients of soils were extracted with DTPA extraction procedure, then differential pulse stripping voltammetry (DPSV) and square wave stripping voltammetry (SWSV) methods were performed with inexpensive and disposable pencil graphite electrode for determination of Cu(II), Zn(II) and Mn(II). Parameters such as deposition potential, deposition time, pH and concentration of the supporting electrolyte were optimised for these ions. Under optimised conditions, the limits of detection were found as 0.01 mg L?1 for Cu(II) and 0.02 mg L?1 for Zn(II) and 0.25 mg L?1 for Mn(II). Relative standard deviation (%RSD) was 6.80, 8.86 and 3.29 for Cu(II), Zn(II) and Mn(II), respectively. The experimental study was conducted using a flame atomic absorption spectroscopy. The described stripping voltammetry methods were successfully applied for the determination of Mn(II), Cu(II) and Zn(II) in soil samples. 相似文献
8.
高效液相色谱光度法测定痕量铜、锌、铁、锰的磺化四苯基卟啉配合物 总被引:7,自引:0,他引:7
本文用磺化四苯基卟啉作柱前衍生试剂,研究了试剂与铜(Ⅱ)、锌(Ⅱ)、铁(Ⅲ)及锰(Ⅱ)的络合反应。在ODS柱上,用乙腈-水(40:60,V/V)作流动相,溴化四丁基铵作离子对试剂,在420nm波长处进行光度检测。提出了离子对反相高效液相色谱快速分离及测定痕量铜、锌、铁及锰的新方法。检测下限为(×10-3ppm):Mn 3.6、Fe 1.8 、Zn 0.93、Cu 0.70。应用于植物样品中痕量铜、锌、铁及锰的测定,分析结果与标准参考值相符。 相似文献
9.
An FAAS method for the determination of Cu, Zn, Ca, Mg and Fe using a microvolume injection technique is described. The injection
volume for the determination of each element is 10 μl and the calibration graphs are linear over the ranges 0.05–1.5, 0.1–3.0,
0.1–2.0, 0.1–2.0 and 1.0–6.0 mg/l for Cu, Zn, Ca, Mg and Fe, respectively. The relative standard deviations are 2.6%, 2.8%,
3.0%, 1.3% and 2.5%, the rates of recovery 98%, 100%, 99%, 99% and 97%. The method was successfully applied to the determination
of these elements in whole blood from healthy infant and mother (lying-in) ears.
Received: 9 July 1996 / Revised: 25 September 1996 / Accepted: 28 September 1996 相似文献
10.
电感耦合等离子体质谱法测定磷矿石中锰、铜、铅、锌、铬、镉 总被引:1,自引:0,他引:1
建立了HNO3-HCl O4-HF混合酸溶样,电感耦合等离子体质谱法同时测定磷矿石中的锰、铜、铅、锌、铬和镉等6个微量重金属元素的有效方法.试验中对仪器的最佳工作参数进行了优化,选择适当的同位素,并用铑作内标元素,有效地抑制了分析信号的漂移.在选定的条件下,对样品进行了精密度和回收率试验,方法相对标准偏差(RSD,n=9)为0.99%~1.98%,加标回收率为98.0%~102.0%. 相似文献
11.
微波衍生-离子对高效液相-磺化四苯基卟啉光度法同时测定痕量镍、铜、锰和锌 总被引:2,自引:0,他引:2
用磺化四苯基卟啉 (TPPS4 )作柱前衍生试剂 ,在微波作用下进行衍生反应 ,研究了衍生和分离Ni2 + ,Mn2 + ,Zn2 + 和Cu2 + 的最佳条件。在 75 0W的微波作用下衍生反应 3min ,在C18柱上采用乙腈 水 (体积比为 2 2 5∶77 5 )体系作流动相 ,四乙基溴化铵 (TEABr)作离子对试剂 ,在 415nm处检测 ,建立了微波衍生 离子对高效液相快速分离、光度检测Ni2 + ,Mn2 + ,Zn2 + 和Cu2 + 的新方法。络合物和反应试剂在 15min内出峰完毕。Zn2 + ,Cu2 + ,Ni2 + 和Mn2 + 的检测限分别为 0 0 5 μg/L ,0 0 1μg/L ,0 10 μg/L和 0 40 μg/L。 相似文献
12.
A nondestructive X-ray fluorescence technique has been developed to determine Na, Mg, Al, Si, P, S, Cl, K, Ca, Ti, Cr, Mn,
Fe, Ni, Cu, Zn, Br, Rb, Sr, Ba, and Pb in plants. The line element intensities were measured by an S4 Pioneer X-ray sequence
spectrometer (Bruker AXS, Germany). The inversely proportional relationship was obtained between the analyte line intensity
and mass of the plant, pressed on boric acid backing, for elements with an atomic number 11 < Z < 20. It was found that reduction of plant mass from 6 to 1 g leads to an increase in element determination sensitivity.
The detection limits for 1 g of pressed plant were evaluated as μg/g: 5–20 (Na, Mg, Al); 1–4 (Si, P, S, Cl, K, Ca, Ti, Ba,
Pb); 0.4-0.8 (Cr, Mn, Fe, Ni, Br, Cu, Zn, Rb and Sr). This technique was applied to determine the element composition of violets
of Violaceae family, which are used in medicine. 相似文献
13.
Ghoneim MM Hassanein AM Hammam E Beltagi AM 《Fresenius' Journal of Analytical Chemistry》2000,368(4):378-383
A highly sensitive and selective voltammetric procedure is described for the simultaneous determination of eleven elements (Cd, Pb, Cu, Sb, Bi, Se, Zn, Mn, Ni, Co and Fe) in water samples. Firstly, differential pulse anodic stripping voltammetry (DPASV) with a hanging mercury drop electrode (HMDE) is used for the direct simultaneous determination of Cd, Pb, Cu, Sb and Bi in 0.1 M HCI solution (pH = 1) containing 2 M NaCl. Then, differential pulse cathodic stripping voltammetry (DPCSV) is used for the determination of Se in the same solution. Zn is subsequently determined by DPASV after raising the pH of the same solution to pH 4. Next, the pH of the medium is raised to pH 8.5 by adding NH3/NH4Cl buffer solution for the determination of Mn by DPASV. Ni and Co are determined in the same solution by differential pulse adsorptive stripping voltammetry (DPAdSV) after adding DMG (1 x 10(-4) M). Finally, 1 x 10(-5) M 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) is added to the solution for the determination of Fe by DPAdSV. The optimal conditions are described. Relative standard deviations and relative errors are calculated for the eleven elements at three different concentration levels. The lower detection limits for the investigated elements range from 1.11 x 10(-10) to 1.05 x 10(-9)M, depending on the element determined. The proposed analysis scheme was applied for the determination of these eleven elements in some ground water samples. 相似文献
14.
V. Krivan 《Journal of Radioanalytical and Nuclear Chemistry》1975,26(1):151-163
Proton activation analysis has been applied to develop a procedure for the simultaneous determination of chromium, nickel
and copper. The procedure involves the bombardment of the sample with protons to induce52Cr(p, n)52mMn,60Ni(p, n)60Cu and63Cu(p, n)63Zn reactions. These reactions have been studied for proton energies from 11 MeV to 15 MeV. Thick target yields for the production
of the indicator radionuclides as well as the sensitivities of the determination have been measured in this energy region
and are compared with results obtained for other charged particle induced reactions. Detailed data are given on nuclear and
instrumental interferences. The trace elements have been determined nondestructively and simultaneously in cobalt with a relative
precision of 8 to 15%. 相似文献
15.
《Analytical letters》2012,45(13):2665-2677
ABSTRACT A method for the simultaneous determination of Mn, Co, Zn and Ni which combines Ion-chromatography and a post column reaction with xylenol orange is described. Using 0.07 M oxalic acid (pH adjusted to 5.5 with lithium hydroxide) as eluent, Mn, Co, Zn and Ni were first separated on a 4x250mm IonpacCS-5 column having both sulphonic acid and Alkyl quaternary ammonia functional groups and then transferred to a post-column reaction coil, where the elements react with xylenol orange. The coloured complexes formed were spectrophotometrically measured at 570 nm. The procedure has been successfully applied for the determination of Co, Zn and Ni in Al-bronze. 相似文献
16.
张晨 《中国无机分析化学》2020,10(6):18-22
针对银精矿样品复杂,难消解的特点,研究了不同酸溶法和碱熔法对样品的消解情况,建立了硝酸,盐酸,氢氟酸,高氯酸消解银精矿的方法。根据元素灵敏度和抗干扰性,选定各元素的测定波长。通过酸溶样和碱熔样测定结果比对,验证了方法准确性。建立了四酸消解-电感耦合等离子体光谱法测定银精矿中铜、铅、锌、砷、镉、钙、镁、锰含量的方法,元素的线性相关系数均在0.9999以上。通过共存元素干扰实验,确定了银精矿中高含量元素(铜、铅、锌、铁、锑、铋等)对测定元素结果没有影响。方法检出限:Cu 0.0063 mg/L, Pb 0.0159 mg/L ,Zn 0.0090 mg/L,As 0.0192 mg/L, Cd 0.0093 mg/L ,Ca 0.0084 mg/L, Mg 0.0075 mg/L, Mn 0.0081 mg/L。测定下限:Cu 0.0105mg/L,Pb 0.0265 mg/L, Zn 0.0150 mg/L, As 0.0320 mg/L, Cd 0.0155 mg/L, Ca 0.0140 mg/L, Mg 0.0125 mg/L,Mn 0.0135 mg/L。3个样品的相对标准偏差在0.87%~3.56%之间,加标回收率在95.00%~103.56%之间。方法流程短,操作简单,快速,灵敏度和再现性高,结果准确可靠,可以满足银精矿中铜、铅、锌、砷、镉、钙、镁、锰含量的测定。 相似文献
17.
Li XJ Schramel P Wang HZ Grill P Kettrup A 《Analytical and bioanalytical chemistry》1996,356(1):52-56
A combination of DAM-SCN– third phase extraction and inductively coupled plasma emission spectrometry (ICP-AES) is used for the determination of trace metal ions in a river water and a seawater reference material. An implementation of the third phase extraction prior to ICP-AES allows a preconcentration of trace elements (Co, Cu, Mn, Fe, V, Ti, Mn) by a factor ranging from 33 to 45. A complete separation of these elements is accomplished from matrices, normally affecting the excitation characteristics of ICP and suppressing the elemental signals severely. Different factors, including pH of the solutions, amounts of reagents, matrix effects, have been investigated and optimized. Under the conditions selected, the limits of determination have been in the range of 0.02 to 0.6 g/L. The system has been successfully applied to the determination of Cu, Mn, V in the reference river water SLRS-3 and Mo in the reference seawater NASS-3. The results were in a good agreement with the certified values. 相似文献
18.
等离子体原子荧光光谱法测定碳酸锂中钠、钾、钙、镁、铜、铁、钴、镍、锰、锌、镉 总被引:2,自引:0,他引:2
建立了用ICP-AFS同时测定碳酸锂中11种微量金属杂质元素的方法。加入甲烷可改善检出限,方法简便,样品分析结果与AAS法结果一致。 相似文献
19.
The binding of Cu, Fe, Mn, and Zn to proteins in blood and in blood fractions was investigated, since their interactions in free radical metabolism in humans is of great interest. An HPLC-ICP-AES technique was developed allowing adequate separation of metalloproteins and of inorganic and organic metal species. For the separation of metalloproteins in erythrocytes and blood plasma a Merck Superformance Fractogel EMD BioSEC 650 (S) column was used. Size exclusion chromatography (SEC)-HPLC was hyphenated to ICP-AES both on-line and off-line for the detection of trace elements in the fractions resulting from HPLC separations. HPLC parameters, pH, temperature, flow rate and salt concentration were optimized for the protein separation and the optimal conditions were applied for the hyphenation to the ICP-AES detector. The separation column was calibrated with five standard proteins. For the element determination by ICP-AES a line selection with respect to the sensitivity was performed. Three different methods were used for the determination of trace elements in blood: direct determinations, on-line and off-line SEC-HPLC-ICP-AES measurements. For the optimizing experiments blood samples of one female subject were used. The direct determination by ICP-AES of the elements was performed in blood and blood fractions of ten different subjects to obtain the average concentration ranges. From the results the identification of the protein Cu/Zn superoxide dismutase in erythrocytes was possible. The LOD were 0.03 microgram mL-1 for Cu, 0.026 microgram mL-1 for Fe, 0.8 ng mL-1 for Mn, and 0.09 microgram mL-1 for Zn in a synthetic blood matrix. 相似文献
20.
五种中草药中七种元素含量测定研究 总被引:6,自引:2,他引:6
用火焰原子吸收法对五种中草药中K,Ca,Mg,Cu,Zn,Fe,Mn进行了测定,结果表明,这些元素与中药的药理作用有相关性。 相似文献