火焰原子吸收法测定树头发的微量元素

使用灰化法处理样品,火焰原子吸收光谱法测定了药用真菌树头发中的Zn、Se、Fe、Cu、Ag、Cd的含量。结果表明,除Cd未检出外,树头发中的微量元素含量Zn、Se、Fe、Cu、Ag分别为12．835、2．376、35．256、1．029、0．078μg／g,各元素含量由高到低顺序为：Fe、Zn、Se、Cu、Ag,加标回收率为96．3％-106．7％。     

原子吸收光谱法测定莲子和莲子心中7种金属元素含量

利用火焰原子吸收光谱法测定6种不同产地的湘莲莲子和莲子心中7种金属元素含量. 莲子和莲子心样品经粉碎干燥后, 用硝酸-高氯酸混合液进行消解处理,采用火焰原子吸收光谱法测定样品中Cr、Cu、Zn、Fe、Mn、Pb、Cd的含量. 莲子和莲子心中富含微量元素Fe、Mn、Zn、Cu、Cr,有害金属元素Pb和Cd未检出. 各元素的加标回收率为98.58%~101.53%,RSD在0.78%~1.89%之间. 方法快速、简便、灵敏,结果准确可靠,为莲子和莲子心中金属元素含量测定提供了一种可靠的方法.     

原子吸收光谱法测定赣南野生草菇中的7种金属元素

为开发和利用赣南野生草菇提供科学依据，采用原子吸收光谱法测定了其中Zn、Co、Ni、Cu、Fe、Cr和Mg7种金属元素的含量。结果表明，草菇中Zn、Co、Ni、Fe、Cr和Mg含量丰富，Cu含量较低，Zn与Cu值为7．4，与抗癌中药中微元素的含量有Zn高Cu低的关系相同，说明赣南野生草菇有较高的营养价值。     

西安地区成年健康人群血清中微量元素正常值研究

用随机抽样的方法对西安地区436名健康人血清中Zn、Fe、Cu、Mn、Pb、Cd、Cr、Ni、Mo和Se十种微量元素正常值进行石墨炉原子吸收光谱法测定，并用ST286型计算机进行多因素相关分析和统计处理．结果表明，血清Zn、Cu分布比较集中，其它元素变异度比较大；多数元素与年龄呈相关关系。其中Zn、Cu、Fe、Mn、Pb、Se与年龄呈正相关 而Mo则与年龄呈负相关；多数元素含量与地城环境中徽量元素的分布有明显的相似性．总之，不同地区不同性别和不同年龄段血清微量元素有显著的差异．     

微波消解-火焰原子吸收法测定垃圾焚烧飞灰中的金属含量

采用NHO3＋HF＋H2O2体系微波消解垃圾焚烧飞灰,火焰原子吸收光谱法测定金属Cu,Fe,Pb,Ni,Mn,Cr和Cd的含量。结果表明,飞灰中Cu质量分数为0．8927mg／g,Pb质量分数为1．8490mg／g,Ni质量分数为0．1523mg／g,Mn质量分数为1．1033mg/g,Fe质量分数为86．4517mg／g,Cr质量分数为0．3667mg／g,Cd质量分数为0．0581mg／g。铁的检测限为3．9041mg／L,其它元素均小于1mg／L,加标回收率在98．0％-108．0％之间。RSD〈4．0％。该法简便快速,具有较好的准确度和精密度,测定结果为处理垃圾焚烧所产生的飞灰提供了理论依据。     

Determination of Seven Metal Elements in Gannan Wild by AAS

为开发和利用赣南野生草菇提供科学依据,采用原子吸收光谱法测定了其中Zn、Co、Ni、Cu、Fe、Cr和Mg 7种金属元素的含量.结果表明,草菇中Zn、Co、Ni、Fe、Cr和Mg含量丰富,Cu含量较低,Zn与Cu值为7.4,与抗癌中药中微元素的含量有Zn高Cu低的关系相同,说明赣南野生草菇有较高的营养价值.     

主成分分析用于浙贝母中无机元素含量的研究

采用原子吸收光谱（AAS）法测定了10个浙贝母样品中12种无机元素的含量,建立浙贝母无机元素指纹图谱,并用SPSS13．0方差分析和主成分分析对浙贝母中的微量元素进行了分析。结果表明,浙贝母的特征无机元素是Cd,Cu,Pb,Mg,Cr,Fe,Zn。可见主成分分析法是浙贝母无机元素分析的有效方法。     

火焰原子吸收法测定灰兜巴中微量金属元素

用火焰原子吸收法测定灰兜巴中微量金属元素的含量,探讨灰兜巴中微量金属元素与治疗糖尿病的相关性。采集灰兜巴以及灰兜巴连接的老茶叶和土壤试样,水煮提取、纱布过滤、静止后取其上层液,用HNO3-HClO4消解,再用稀HNO3溶解,定容,离心,取其上清液,用火焰原子吸收光谱法测定Zn、Cr、Se、Mg、Mn、Co、Cu、Ni和Cd 9种元素的含量。结果表明糖尿病人常偏高的Cu、Ni和Cd元素在灰兜巴中含量相对较低,而糖尿病人常偏低的Zn、Cr、Se、Mg、Mn和Co元素在灰兜巴中的含量相对较高。灰兜巴中Zn、Cr、Se、Mg、Mn、Co、Cu、Ni和Cd等重要微量金属元素的含量很适合糖尿病人,灰兜巴中的微量元素在缓解、治疗糖尿病方面可能发挥了重要作用。     

肺癌组织中微量元素的研究

用ICP等离子体发射光谱法测定了肺癌组织中Cd、Cr、Co、Mg、Mn、Ni、Pb、Sr、Ti、Se、Al、Ba、Zn、Fe、Cu、Be等16种微量元素古量。结果显示．与同侧无癌肺叶组织相比较，肺鳞癌和肺腺癌组织中Cr、Cu和Mg含量均显著升高．Cd、Mn和Zn含量均显著降低。两型肺癌组织中Cd、Fe和Ba3种元素音量之间存在明显差异．而两型肺癌的同侧无癌肺叶组织的微量元素含量之间除Cd外均无明显差异。     

南药巴戟天中十二种无机元素的初步研究

采用火焰原子吸收光谱法测定了不同产地和生长期的巴戟天中Mn．Fe．Cu．Zn、Ca、Mg、K、Na、Cr、Co、Ni、Pb等十二种无机元素的含量及其灰化率，为研究巴戟天的药效及栽培技术提供了实验数据．     

原子吸收光谱法测定皇冠草地上部分的7种微量元素

采用原子吸收光谱法测定了皇冠草地上部分所含微量元素铜、锰、锌、铁、镉、铅、铬.结果表明,皇冠草地上部分含有较丰富的铜、锰、锌、铁,RSD≤4.23％(n=4),加标回收率99.20％～103.00％.     

青藏高原白刺、枸杞和沙棘果粉中微量元素含量比较研究

采用原子吸收光谱法、氢化物原子荧光光谱法对青藏高原白刺、枸杞、沙棘果粉中的13种元素进行了分析测定。结果表明,3种植物果粉中的Cu、Fe、Mn、Zn、K、Ca、Na、Mg等8种元素含量丰富且差异显著,Pb、As、Cr、Cd、Hg等5种重金属元素含量均较低,为3种植物资源深度开发利用提供了基础数据。     

仙人掌果汁红色素含量测定与微量元素分析

用可见分光光度法与等离子体发射光谱法对仙人掌果汁色素及其微量元素的含量进行了测定，仙人掌果汁色素含量达２．１％￣３．３％，成熟果的果汁色素含量比预成熟果大。在２７种被测定的元素中，除Ａｓ、Ｂｅ、Ｃｄ、Ｃｏ、Ｍｏ、Ｐｂ，Ｓｂ，Ｔｌ等未被检出外，其余Ａｇ，Ａｌ，Ｂ，Ｂａ，Ｃａ，Ｃｒ，Ｃｕ，Ｆｅ，Ｍｇ，Ｍｎ，Ｎａ，Ｎｉ，Ｓｅ，Ｖ，Ｚｎ，Ｋ，Ｐ，Ｓ等均有准确测定值。成熟果与预成熟果的果汁微量元素含量无明显     

青海柴达木地区植物白刺叶中微量元素特征

青海柴达木地区分布有丰富的白刺植物资源。利用220FS原子吸收光谱仪分析了该地区三种白刺叶片的Cu,Zn,Fe,Mn,Cr,Ni,Cd等微量元素。结果表明，铬、 锰含量显著提高是青海柴达木地区植物白刺叶资源微量元素特征。这为柴达木地区白刺叶资源的开发利用提供科学依据。     

Principal component analysis: a chemometric aid for classification of polluted and unpolluted mussels

Ten trace elements (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb) were determined in the dissolved ash of the edible part of wild mussels (28 samples) from a polluted site by electrothermal atomic absorption spectrometry. The distribution of the concentration of each element in the mussels was first investigated by means of a test of normality. The correlation matrix around the mean was used as a starting matrix for principal component analysis (PCA). Ten variables were reduced to two principal components, accounting for 77% of the total variance; Al, Cr, Mn, Fe, Zn, Cd and Pb are all positively associated with the first principal component and form a cluster of variables, indicating a common terrigenous origin. Comparison with 43 samples of unpolluted mussels from a nearby hatchery, on the basis of eight common variables (concentration of Mn, Fe, Co, Ni, Cu, Zn, Cd and Pb; 71 samples) by using a two-dimensional plot of PC scores, allows the mussels from the two sites to be differentiated.     

Determination of Cu, Zn, Fe, Ni and Cd by flame atomic absorption spectrophotometry after preconcentration by Escherichia coli immobilized on sepiolite

A method for the determination of Cu, Zn, Fe, Ni and Cd by flame atomic absorption spectrophotometry (FAAS) after preconcentrating on a column containing Escherichia coli immobilized on sepiolite has been developed. Optimum pH values, amount of adsorbent, elution solution and flow rate have been obtained for the elements studied. The effect of interfering ions on the recovery of the analytes has also been investigated. Recoveries of Cu, Zn, Fe, Ni and Cd by E. coli immobilized on sepiolite were 99.1+/-0.6, 98.2+/-0.6, 98.1+/-0.5, 97.2+/-0.8 and 98.2+/-0.4% at 95% confidence level, respectively. The adsorption capacity of E. coli immobilized on sepiolite was found as 0.148, 0.064, 0.098, 0.134 and 0.088 mmol/g for Cu, Zn, Fe, Ni and Cd, respectively. The proposed method was applied to the determination of trace metals in alloys (NBS SRM 85b). Trace metals have been determined with relative error lower than 10%.     

Determination of Trace Elements in Arsenic and Antimony Minerals by Atomic Absorption Spectrometry and k0-Instrumental Neutron Activation Analysis After Removal of As and Sb

The content of trace elements in arsenic and antimony minerals from the Allchar mine, Macedonia, was determined by electrothermal atomic absorption spectrometry (ETAAS) and k₀-instrumental neutron activation analysis (k₀-INAA) after removal of arsenic and antimony. Their direct determination by ETAAS or k₀-INAA in arsenic (realgar and orpiment) and antimony (stibnite) minerals is limited by strong matrix interferences from As and Sb. Successful elimination of both elements was realized by the extraction of their iodide complexes into toluene. It was found that the optimal conditions were triple extraction of arsenic into toluene from 6mol·L^–1 HCl with addition of KI. Triple extraction of antimony was most successful in the system 4.5mol·L^–1 H₂SO₄ and KI into toluene. In both cases, trace elements (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) were then detected in the aqueous phase by ETAAS. The proposed procedures with ETAAS were checked by the method of standard additions and Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn determined in realgar, orpiment and stibnite. Using k₀-INAA the trace elements Ba, Ce, Co, Cr, Cs, Fe, Hg, Sc, Tb, Th, U and Zn in realgar and orpiment were determined before and after As and Sb removal from the same aliquot of sample. The removal of both elements with KI into toluene was higher than 99.8% and no losses of trace elements were observed.     

不同产地高良姜无机元素含量的比较

用等离子体发射光谱法测定了三个不同产地高良姜的元素含量，在２７种被测元素中，除Ａｓ、Ｂｅ、Ｃｒ、Ｍｏ、Ｐｂ、Ｓｂ、Ｔｌ７种元素未被检出外，三个产地的高良姜均含有Ａｇ、Ａｌ、Ｂ、Ｂａ、Ｃａ、Ｃｄ、Ｃｏ、Ｃｕ、Ｆｅ、Ｍｇ、Ｍｎ、Ｎａ、Ｎｉ、Ｓｅ、Ｓｉ、Ｖ、Ｚｎ、Ｋ、Ｐ、Ｓ２０种元素，湛江产的高良姜大多数元素的含量要高于其它两地。Ｚｎ和Ｍｎ两种人体必需微量元素的含量较丰富。     

青海枸杞子中微量元素含量的测定

测定了青海枸杞子中锌、铜、锰、铅、砷、铁、硒等微量元素的含量。结果表明,青海枸杞子中含锌18.65μg/g,铜15.62μg/g,锰6.24μg/g,铅1.03μg/g,砷0.24μg/g,铁19.68μg/g,硒2.15μg/g,人体必需微量元素含量丰富,是枸杞具有极为重要的保健、防病、治病功能的重要原因之一。