香菜根茎叶中Fe Mn Zn微量元素含量测定

硝酸和高氯酸(4+1)消解样品,火焰原子吸收光谱法测定香菜的根、茎、叶中Fe、Mn、Zn 3种微量元素的含量。结果表明:香菜植株中Fe、Mn、Zn元素含量丰富且不同部位含量不同,Fe、Mn、Zn含量分别为:根部,387.2μg/g、44.50μg/g、113.2μg/g;茎部,173.3μg/g、50.12μg/g、68.02μg/g;叶中,176.1μg/g、70.23μg/g、94.21μg/g。RSD<1.50%,回收率在96.70%~102.0%之间,结果令人满意。     

火龙果中微量元素Fe Mn Zn含量测定

采用硝酸和高氯酸(4+1)消解样品,火焰原子吸收光谱法测定火龙果果肉、果皮中Fe、Mn、Zn微量元素的含量。结果表明:火龙果果肉中Fe、Mn、Zn含量分别为104.8μg/g、23.95μg/g、66.40μg/g,果皮中Fe、Mn、Zn含量分别为52.15μg/g、129.6μg/g、80.3μg/g。回收率在95.15%～104.5%之间,RSD小于1.6%,结果满意。     

两种菊花中微量元素含量的测定

目的:采用原子吸收光谱法测定两种菊花中的微量元素含量。方法:用硝酸和高氯酸(4+1)对样品进行消解,火焰原子吸收光谱法测定两种菊花中Fe,Mn,Zn,Cu微量元素的含量。结果:黄山贡菊中Fe,Mn,Zn,Cu的含量分别为54.205μg/g、123.908μg/g、19.522μg/g、197.826μg/g;高原野菊花中Fe,Mn,Zn,Cu的含量分别为64.021μg/g、281.800μg/g、10.908μg/g、119.825μg/g。方法回收率在93.5%~105.4%之间,结果满意。     

山慈姑中6种微量元素的测定

目的:测定山慈姑中Cu、Zn、Fe、Li、Mn、Cd 6种微量元素的含量。方法:采用火焰原子吸收法对山慈姑中Cu、Zn、Fe、Li、Mn、Cd 6种微量元素含量进行测定分析。结果:山慈姑中Cu、Zn、Fe、Li、Mn、Cd含量分别为4.1,20.1,484,5.1,19.5,0.03μg/g(剑河);4.8,19.7,300,5.7,20.8,0.02μg/g(施秉)。方法回收率在92.3%~104.9%之间,相对标准偏差在3%以下。结论:利用火焰原子吸收法测定微量元素方法简单,可靠,为山慈姑药材的质量评价提供了一定的参考。     

蜻蜓蛹中微量元素及其营养价值

蜻蜓蛹含有丰富的蛋白质、脂肪、氨基酸、微量元素等营养成分。采用现代分析技术手段对蜻蜓蛹中Na、K、Fe、Cu、Zn、Mn、Mg 7种微量元素进行分析,结果表明:蜻蜓蛹(干品)中Na、K、Fe、Cu、Zn、Mn、Mg 7种微量元素的含量分别为1340.80、2291.25、596.40、22.65、30.70、26.65、631.25μg/g,是一种有较高开发潜力的天然昆虫资源。     

景泰盐地枸杞子中微量元素锌铁铜锰含量测定

应用原子吸收分光光度法分析了景泰盐地枸杞子中微量元素锌、铁、铜、锰含量,方法准确、可靠。结果表明:景泰盐地枸杞子中含有Zn 64μg/g、Fe 18μg/g、Cu 29μg/g、Mn 30μg/g,与宁夏中宁枸杞子相比,含量略有差异。     

火焰原子吸收法测定生姜中6种元素含量

目的:测定生姜中Ca、Mg常量元素及Cu、Zn、Mn和Cr4种微量元素的含量。方法:利用火焰原子吸收法对生姜中的Ca、Mg、Cu、Zn、Mn、Cd6种元素含量进行测定分析。结果表明:生姜中Ca、Mg、Cu、Zn、Mn、Cd含量分别为130.9、44.52、2.290、2.290、190.2、0.6100μg/g。其中Mn含量最高,Cd含量在允许范围内。测定结果的相对标准偏差均在2.0%以下,加标回收率为92%～109%之间。     

番泻叶中Zn Fe Cu Mn微量元素测定

目的:了解番泻叶中Zn、Fe、Cu、Mn 4种微量元素的分布情况。方法:采用硝酸和高氯酸(体积比为4+1)分解样品,火焰原子吸收光谱法测定番泻叶中的微量元素Zn、Fe、Cu、Mn的含量,对各元素进行了加标回收试验,回收率在91.0%~108.8%之间。结果:在番泻叶中含有丰富的Fe元素和较丰富的Zn、Mn、Cu元素。结论:番泻叶中Fe元素含量最大,Zn、Mn、Cu元素含量较少且差异较小。     

原子吸收光谱法测定排草中微量元素的含量

目的:采用原子吸收光谱法测定中药排草中的微量元素含量。方法:用硝酸和高氯酸(4+1)对样品进行消解,火焰原子吸收光谱法测定排草果中Fe,Mn,Zn,Cu微量元素的含量。结果:排草中Fe,Mn,Zn,Cu的含量分别为156.70、340.90、43.15、23.72μg/g。方法回收率在90.56%～103.8%之间,准确可靠,为排草的进一步开发提供参考。     

三种食用萝卜中微量元素含量的比较

目的　探讨食用萝卜微量元素。方法　火焰原子吸收分光光度法测定红、白和心里美萝卜中的Fe、Cu、Zn、Mn、Cd、Pb等 6种微量元素含量。结果　三种萝卜中均含有丰富的微量元素 ,其中Fe、Zn、Mn的含量较高 ,心里美萝卜中Fe的含量达到10 6 .6 2 μg/ g ,高于白萝卜和红萝卜 ;红萝卜中Zn的含量最高 ,而三种萝卜中有害元素Pb、Cd的含量均较低 ,均低于我国国家食品重金属允许量范围。结论　萝卜中含有丰富的人体必需的微量元素 ,作为食用蔬菜对人体补充微量元素 ,有较高的营养价值。     

藜蒿茎叶中6种元素的测定分析

目的：研究红、白藜蒿茎叶中钙、镁、铁、锰、铜、锌等6种元素含量及其差异性。方法：用原子吸收法测定红、白藜蒿茎叶中6种元素含量，对测定结果进行比较分析。结果：钙、镁、铁、锰、铜、锌含量的测定结果分别为：白藜蒿茎部含量分别为9416、2785、139．4、138．3、22．6、146．7mg／kg，白藜蒿叶部的含量分别为3487、1338、23．3、25．0、7．65、51．7mg／kg，红藜蒿茎部的含量分别为8230、2068、103．7、140．0、36．2、102．8mg／kg，红藜蒿叶部的含量分别为5460、2010、55．1、36．0、24．5、90．1mg／kg。结论：藜蒿中6种元素含量丰富，红、白藜蒿中茎部6种元素含量均大于叶部，红藜蒿与白藜蒿茎、叶中6种元素含量有较大差异。．     

An Indigenous Plant Food Used by Lactating Mothers in West Africa: The Nutrient Composition of the Leaves of Kigelia Africana in Ghana

Although the leaves of Kigelia africana are used to make a palm-nut soup which is consumed mainly by lactating women in many parts of sub-Saharan Africa, little is known about the nutrient qualities of this underutilized and underappreciated plant food. Leaves of Kigelia africana, called “sausage tree” in English and “nufuten” in the Twi language of Ghana, were collected in Kumasi and analyzed for their content of nutritionally important fatty acids, amino acids, minerals, and trace elements. The dried leaves contained 1.62% fatty acids, of which α-linolenic acid and linolenic acid accounted for 44% and 20%, respectively, of the total. Protein accounted for 12.6% of the dry weight and, except for lysine, its overall essential amino acid profile compared favorably to a World Health Organization protein standard for school children. Kigelia leaf contained considerable amounts of many essential elements, including calcium (7,620μg/g), iron (161μg/g), magnesium (2,310μg/g), manganese (14.6μg/g), zinc (39.9μg/g), and chromium (0.83μg/g); selenium, however, was not detected. These data indicate that Kigelia africana leaf compares favorably with many other commonly-consumed green leafy vegetables such as spinach and provides a rational basis for promoting the conservation and propagation of the plant and encouraging its wider use in the diets of populations in sub-Saharan Africa.     

桑叶中的微量元素分析

目的:应用火焰原子吸收法测定新疆不同地区、不同品种、不同季节桑叶中微量元素锌、铁、铜、锰、钙的含量。方法:对试样用硝酸和高氯酸进行消化,采用火焰原子吸收分光光度法进行方法的准确性和精密度考察。结果:标准曲线线性关系良好,平均相对标准偏差小于1.24%,回收率范围在93.6%～103.8%之间,结果令人满意。结论:桑叶的药用价值与其含有丰富的微量元素有一定的相关性,具有较高的开发利用价值。     

学龄前儿童膳食营养素摄入与头发微量元素的相关性分析

目的 研究南宁市3~6岁学龄前儿童膳食营养素摄入对头发部分微量元素含量的影响,为今后评估幼儿营养状况及指导学龄前儿童合理膳食提供依据。 方法 于2016年12月对南宁市3所幼儿园201名3~6岁学龄前儿童进行营养调查,并测定幼儿头发中铜、锌、铁、钙、镁的含量。 结果 201名学龄前儿童头发中铜、铁、钙、镁和锌含量分别为(19.48±7.80)μg/g、(28.04±15.36)μg/g、(419.18±175.48)μg/g、(33.48±18.52)μg/g和(151.12±57.10)μg/g,不同性别学龄前儿童头发中铜、锌、铁、钙和镁含量差异均有统计学意义(P<0.05),不同年龄学龄前儿童头发中铜含量存在差异(P<0.05)。膳食中的蛋白质、碳水化合物、硫胺素、尼克酸、维生素E、磷、镁、铁、锌、锰与发铜含量呈正相关(P<0.05),胡萝卜素、锰与发镁含量呈正相关,脂肪与发镁含量呈负相关(P<0.05),能量、蛋白质、碳水化合物、胡萝卜素、尼克酸、维生素E、镁、铁、锌、锰与发锌呈正相关(P<0.05),脂肪、维生素C与发钙含量呈负相关(P<0.05)。 结论 膳食摄入的营养成分与3~6岁学龄前儿童头发中的微量元素存在一定相关性,头发中微量元素铜和锌易受多种膳食营养成分的影响。     

厚朴叶中微量元素的测定

目的：测定厚朴叶中微量元素的含量。方法：用电感耦合火焰原子发射分光分析仪仪器（ICP—AES）测定湿法消解法和水煎法处理所得的厚朴叶样品,并比较这两种样品中微量元素含量。结果：水煎液中Ca、Mg、Fe、Zn、Cu和Mn6种元素的含量分别为51．21、83．11、1．33、4．42、0．07、1．48μg／g;湿法消解液中Ca、Mg、Fe、Zn、Cu和Mn6种元素的含量分别为580．57、278．63、17．21、16．72、1．02、8．25μg／g。结论：湿法消解液中Ca、Mg、Fe、Zn、Cu和Mn6种元素的含量高于水煎液中这6种元素的含量,采用电感耦合火焰原子发射分光分析仪仪器（ICP—AES）测定厚朴叶中微量元素,操作简单,结果准确,为探讨厚朴叶中微量元素含量与药理关系提供了有用的数据。     

一副傈僳抗肿瘤验方微量元素含量分析

目的:通过测定一副傈僳抗肿瘤验方中一些微量元素的含量,探讨微量元素与人体健康的关系。方法:采用火焰原子吸收光谱法测定一副傈僳抗肿瘤验方中铁、铜、锰、锌4种微量元素的含量。结果:混合药材4种微量元素含量符合人类健康需求标准。结论:实验所用的傈僳抗肿瘤验方中含有多种对人体有益的微量元素,具有相当高的药用价值。     

Dietary intake of trace elements in the general population, estimated from a regional nutritional survey, and comparison with recommended dietary allowances and tolerable upper intake levels

OBJECTIVES: Dietary intake by the general population of trace elements related to human health is not well known. Therefore, values for zinc, copper, manganese, chromium, selenium, molybdenum, cobalt and aluminum were estimated from food intake data from the 1993 Tottori Prefecture Nutritional Survey. For each element, consumption by the individual person was compared to the recommended dietary allowance (RDA) and the tolerable upper intake level (UL). METHODS: Daily intake of trace elements by individuals was calculated from food intake data of 1993 Tottori Prefecture Nutrition Survey by computer program written by visual C++ using the trace element food table published by Suzuki (1993) and compared with RDA and UL values. RESULTS: 1. The percentage of people whose intake of zinc was lower than the RDA was 72.0%. Those for copper and manganese were 69.8% and 39.2%, respectively. Persons aged over 60 years consumed less of those trace elements. 2. Few people had a chromium intake lower than the RDA. The same was the case for molybdenum and selenium. However, 9.2% of people had on intake of chromium in excess of the UL, and for manganese, molybdenum and selenium the figures were 0.7%, 81.6% and 9.6%, respectively. 3. The major sources of the trace elements were cereals, fish, meats, vegetables and beans. CONCLUSIONS: It is necessary to investigate the reason for the low intake of zinc, copper and manganese. It is also to be recommended that food tables for trace elements be produced to feel compliance with the RDA and UL for trace elements.     

妊娠母体及绒毛铁、锌含量的检测

目的:测定早期妊娠母体及绒毛中微量元素铁、锌的含量,并探讨二者的关系。方法:采集12孕周内人工流产患者的绒毛组织及枕后新近长出头发,5∶2HNO3+H2O2体系消解,电感耦合等离子体发射光谱仪(ICP)检测微量元素铁、锌的含量,统计软件SPSS10.0进行数据分析。结果:①绒毛中铁量为(18.26±6.81)μg/g,锌含量为(17.44±10.12)μg/g;母发中铁、锌含量分别为(49.61±34.01)μg/g、(216.39±90.26)μg/g,明显高于绒毛中铁、锌含量(P<0.05)。②绒毛与母体头发中铁含量的相关系数为0.31(P<0.05)、锌含量的相关系数为0.04(P>0.05)。结论:绒毛中铁含量与母发存在正相关性,可以通过检测母亲头发中铁的含量了解胚胎营养状况;而绒毛中的锌与母发中的锌不存在相关性。     

Metabolic balances of cadmium, copper, manganese, and zinc in man.

Balance studies of cadmium, copper, manganese, and zine were carried out under constant dietary conditions in eight adult males during two calcium intake levels of 200 and 800 mg/day and in an additional single case during a calcium intake of 1500 mg/day. The dietary content and the excretions of these elements in urine and stool were determined. The mean dietary content of cadmium was 32.9 micrograms/day, of copper 1020 micrograms/day, of manganese 2130 micrograms/day, and of zinc 12.4 mg/day. The ratio of the fecal/urinary cadmium excretion was approximately 1.5 and the main pathway of excretion of the other three elements was via the intestine, while the urinary excretions were very low. The different trace element balances were either slightly negative or in equilibrium, except that the zinc balances was positive in 50% of the cases. All balances should be considered maximal values, as the losses in sweat were not determined. The calcium intake level had little effect on the excretion and retention of these trace elements.     

Evaluation of Trace Metals in Tea Samples from Jeddah and Jazan, Saudi Arabia by Atomic Absorption Spectrometry

The Cd, Pb, Mn, Zn, Ni, Co, Fe, Cr and Cu content were determined in various teas available in local markets of Jeddah and Jazan, Saudi Arabia. Concentrations of the trace metals were measured after acid digestion using a flame atomic absorption spectrometer. Validation of the digestion procedure was performed by the analysis of a certified reference material. The cadmium, lead, manganese, zinc, nickel, cobalt, iron, chromium and copper concentrations were found in the range of below the detection limit (BDL)—0.7 μg/g, BDL—8.7 μg/g, 48–859 μg/g, 6.6–120 μg/g, BDL—16.9 μg/g, BDL—3.1 μg/g, 46–348 μg/g, BDL—4.9 μg/g and 5.2–21.6 μg/g respectively. The values found in this study were compared with literature values.