不同生长时期盐藻无机元素分析

测定了对数生长期和稳定期盐藻中10种无机元素K、Na、Ca、Mg、P、Cu、Zn、Fe、Mn、Se的含量。结果表明，稳定期盐藻中K、Ca、Mg、Cu、Zn、Fe、Mn、Se的含量比对数生长期都有不同程度的增加，Na、P的含量反而降低。     

麒麟菜提取物中的8种无机元素分析

应用原子吸收光谱法分析了麒麟菜提取物中的8种无机元素含量。结果显示,麒麟菜提取物中含有丰富的人体必需无机元素,宏量元素以Na的含量最高,微量元素以Fe的含量最高,8种无机元素中的含量由大到小顺序是:Na,K,Mg,Ca,Fe,Zn,Cu,Mn。     

青海歧穗大黄及其生长土壤中9种无机元素含量特征

为对比青海高原境内不同生境歧穗大黄中9种无机元素含量特征,用原子吸收光谱法分析了其宏量元素K、Na、Ca、Mg、P及微量元素Cu、Zn、Fe、Mn含量。结果表明,青海歧穗大黄植物与其土壤环境呈现出不同的无机元素含量特征,但一致表现为Ca和P在植物的富集,且植物中P含量随海拔升高而明显增加,Zn含量随海拔升高而增加。     

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．     

Graves病患者血清七种元素含量变化及临床意义

采用原子吸收和火焰光谱分析法，检测Graves病患者308例和209名正常对照组的血清微量元素Zn、Cu、Fe和常量元素Ca、Mg，K、Na含量．结果显示，Graves病患者Zn、Fe、Mg、K及Zn／Cu、Ha／K低于对照组．而Cu、Ca、Ca／MR则高于对照组．结合本研究结果，我们对七种元素与T3、T4及生化指标的关系进行了分析．     

电感耦合等离子体原子发射光谱法(ICP-AES)测定金鸡胶囊中的7种无机元素

建立了测定金鸡胶囊中Ca、Mg、Mn、Fe、Cu、Zn和Sr 7种无机元素含量的分析方法.采用浓硝酸和高氯酸(8+2)的混合酸溶解样品,利用电感耦合等离子体原子发射光谱法(ICP-AES)对各种元素进行测定.金鸡胶囊含有丰富的对人体有益的无机元素,对待测样品的测定结果表明,Ca、Mg、Fe、Mn、Zn、Sr和Cu的含量...     

ICP-MS法分析白花蛇舌草中16种无机元素初级形态

应用电感耦合等离子体质谱技术(ICP-MS),分析了白花蛇舌中16种无机元素的初级形态;并研究了微波辅助萃取、超声辅助萃取、恒温水浴萃取三种萃取方式对其溶出特性的影响。结果显示:白花蛇舌草中含有丰富的无机元素,这可能促进其有效成分作用的发挥。除Cu、Se外,其它元素的微波萃取的萃取效率最高;Mg、K、Ca、Mn、Ni、Se、Ba的溶解态含量较高,其他元素主要以悬浮态的形式存在于溶液中。     

火焰原子吸收光谱法测定黄花菜根中微量元素含量

采用火焰原子吸收光谱法测定了黄花菜根中Ca、Fe、Zn、Cu、Mn、K和Mg 7种金属元素含量.结果表明,在常量元素中K、Ca含量较高,微量元素中Fe、Cu含量较高,7种金属元素含量由高到低顺序分别为:K、Ca、Mg、Fe、Cu、Zn、Mn.加样回收率为98.75％～106.25％,该法操作简单、结果准确,是黄花菜根中...     

ICP–AES法测定黄瓜中的8种元素

利用微波消解法消解样品,建立电感耦合等离子体原子发射光谱(ICP–AES)法,对大黄瓜和荷兰小黄瓜两种黄瓜样品中的K,Ca,Mg,Fe,Mn,Cu,Zn,Se 8种元素进行含量测定。K+线性范围为0~100μg/m L,Ca2+,Mg2+线性范围为0~20μg/m L,其余离子线性范围为0~2.0μg/m L,相关系数在0.999 6~1.000 0之间,样品加标回收测定结果的相对标准偏差均小于5%(n=6),加标回收率为93.4%~103.2%。结果表明人体所必须的常量元素K,Ca,Mg在两种黄瓜样品中均大量存在,荷兰小黄瓜中K,Ca,Cu,Mn的含量高于大黄瓜,而Fe,Mg,Se的含量低于大黄瓜,Zn在两种黄瓜样品中含量相当。该法可用于测定黄瓜样品中的K,Ca,Mg,Fe,Mn,Cu,Zn,Se元素含量。     

火焰原子吸收光谱法测定红松松针中微量元素含量

采用火焰原子吸收光谱法测定了长白山红松松针中K、Ca、Mg、Zn、Cu、Fe和Mn 7种金属元素含量。结果表明,在常量元素中K、Ca含量较高,微量元素中Fe、Zn含量较高,7种金属元素含量由高到低顺序分别为:K、Ca、Fe、Mg、Zn、Mn、Cu。可见松针中含有丰富的与健康密切相关的微量元素,具有较高的食用和药用价值。     

Analytical approach to the discoloration of edible laver "nori" in the Ariake Sea.

To understand the cause of discoloration of the sea laver "nori," which is found in the Ariake Sea, the concentrations of pigments and elements in the normal and discolored laver samples were determined. In the discolored samples, a decrease in all of the pigments, chlorophyll a and carotenoids, and proteinous pigments, phycobiliproteins, was clearly observed. This was accompanied by a decrease in the content of Fe, Zn, Mn, Cu, and P. Good correlations between these elements and chlorophyll a, as well as between these elements and phycobiliproteins, were confirmed, indicating that, in addition to the deficiency of nitrogen and phosphorus, the deficiency of trace elements (Fe, Zn, Mn, and Cu), which are specifically required for photosynthesis, could be a reason for the discoloration of nori. The cause of elemental deficiency is also discussed.     

偶氮化合物的光电导性能的研究

本文合成了五种双偶氮颜料,它们是以芴酮为桥基,以含有五种不同取代基的色酚为偶合剂的化合物.测定了这些化合物的吸收光谱和X射线衍射光谱;分别以这五种偶氮颜料为电荷产生材料制备了功能分离型双层光电导体,并对它们的光电导性能进行了研究.     

Analysis of fresco by laser induced breakdown spectroscopy

The laser-based techniques have been shown to be a very powerful tool for artworks characterization and are used in the field of cultural heritage for the offered advantages of minimum invasiveness, in situ applicability and high sensitivity. Laser induced breakdown spectroscopy, in particular, has been applied in this field to many different kinds of ancient materials with successful results. In this work, a fragment of a Roman wall painting from the archaeological area of Pompeii has been investigated by LIBS. The sample elemental composition resulting from LIBS measurements suggested the presence of certain pigments. The ratio of the intensities of different lines related to some characteristic elements is proposed as an indicator for pigment recognition.     

Thermal stability and colour properties of new pigments based on BiREO3

A series of novel environmentally inorganic pigments based on Bi₂O₃ doped by rare-earth elements RE (Er, Ho, La, Nd, Dy, Lu and Y) have been developed and characterized using methods of thermal analysis, X-ray powder diffraction and by reflectance spectral data. The new pigments have been synthesized from mixtures containing Bi₂O₃ and RE₂O₃ by traditional solid-state route. The incorporation of RE³⁺ into crystal lattice Bi₂O₃ changes the colour from yellow, yellow-orange to orange. The simultaneous TG?CDTA measurements were used for determination of the temperature region of the pigment formation and thermal stability of pigments. The results confirm the positive effect of rare-earth ions doped into Bi₂O₃ that contribute to a growth of thermal stability of prepared pigments.     

ZrTiO4-Mischphasenpigmente

Mixed-phase Pigments with ZrTiO₄ 1. A summary is given of mixed-phase pigments with rutile. fluorite, baddeleyite, and zircon structure. ZrTiO₄ as a host for the synthesis of new ceramic mixed-phase pigments of high thermic stability is cited. 2. A new and technical interesting synthesis of ZrTiO₄ is given. The yet unknown picnometric density of this new compound is 5.06 ± 0,01 g/ml. 3. 9 equations of incorporation for the formation of mixed-phases and the qualified elements are described. 4. Experiments are compiled, arranged by the equations of incorporation. Spectral reflectances of some interesting coloured ZrTiO₄-mixed-phase pigments are drawn.     

Characterization of cobalt pigments found in traditional Valencian ceramics by means of laser ablation-inductively coupled plasma mass spectrometry and portable X-ray fluorescence spectrometry

In this work, a comparison of the performances of laser ablation-inductively coupled plasma mass spectrometry (LA-ICPMS) and portable X-ray fluorescence (XRF) spectrometry for the characterization of cobalt blue pigments used in the decoration of Valencian ceramics is presented. Qualitative data on the elemental composition of the blue pigments obtained using both techniques show a good agreement. Moreover, the results clearly illustrate that potters utilized different kinds of cobalt pigments in different historical periods.

While both techniques seem suitable for the proposed task, they show different strengths and weaknesses. Portable X-ray fluorescence spectrometry is a cheaper and totally non-destructive technique, capable of providing fast and reliable results at the mg g⁻¹ level. LA-ICPMS, on the other hand, offers a much higher detection power and better spatial resolution, but its use results in some sample damage (sample consumption at the μg level), while it is a more expensive and non-portable technique.     

Pigment identification in paintings employing laser induced breakdown spectroscopy and Raman microscopy

Laser-induced breakdown spectroscopy (LIBS) was used in combination with Raman microscopy, for the identification of pigments in different types of painted works of art. More specifically, a 19th century post-Byzantine icon from Greece and two miniature paintings from France were examined and detailed spectral data are presented which lead to the identification of the pigments used. LIBS measurements yielded information on the presence of pigments or mixtures of pigments based on the characteristic emission from specific elements. Identification of most pigments was performed by Raman microscopy. As demonstrated in this work, the combined use of LIBS and Raman microscopy, two complementary techniques, leads to a detailed characterization of the paintings examined with respect to the pigments used.     

Non-destructive and in situ identification of rice paper, seals and pigments by FT-IR and XRD spectroscopy

This paper studied the chemical characteristics of rice paper, pigments and seals on Chinese calligraphies and traditional Chinese paintings. The techniques used here were Fourier transform infrared (FT-IR) spectroscopy and X-ray diffraction (XRD). FT-IR allows good identification of the substances present in pigments and inkpads and differentiates each era of rice paper. This can be the base of estimating the age of rice paper. Different crystalline phases can be identified by XRD, which is further evidence to separate different kinds of pigments or inkpads. Both of these methods were non-destructive in situ analysis and can be used in the identification in calligraphies and traditional Chinese paintings. These results confirmed that the applied techniques are relatively quicker and more reliable than traditional approaches authenticated by years of experience.     

Synthesis and characterization of environmentally benign calcium-doped Pr2Mo2O9 pigments: Applications in coloring of plastics

A new class of environmentally benign rare earth pigments of general formula Pr_2−xCa_xMo₂O_9−δ (x ranges from 0 to 1.0) displaying colors ranging from green to yellow were synthesized by traditional solid-state route, as alternatives to lead, cadmium and chromium colorants. The products were characterized by X-ray powder diffraction, UV-vis spectroscopy and CIE-L*a*b* 1976 color scales. The coloring mechanism is based on the strong absorptions of the pigments in the blue and red regions due to electronic transitions between 4f²→4f¹5d¹ states of Pr³⁺. The designed pigments consist of non-toxic elements and further found to be thermally and chemically stable. The yellow-green pigments were found to be interesting alternatives to existing toxic pigments for coloration of plastics.     

Aragonite in Roman wall paintings of the VIII(a) Regio, Aemilia, and X(a) Regio, Venetia et Histria

In the Roman wall paintings different white colours were used, named Paraetonium, Melinum, Anularia, Eretria, Argentaria, etc. FTIR, Raman spectroscopy and X-Ray diffraction were applied to study different white pigments, such as calcite, aragonite, dolomite and huntite, white carbonates present in archaeological findings from Roman walls in the Mediterranean region. This study showed that it is possible to distinguish and identify these components in white colours. About 450 samples of Roman wall paintings were analysed and it was observed that often aragonite is associated to precious coloured pigments. On the basis of the obtained results some considerations about the period in which the different kinds of white pigments were used are proposed.