2017/10/27 10:55
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金索坤 SK-锐析 双道原子荧光分光光度计
型号: SK-锐析
产地: 北京
品牌: 金索坤
¥30万 - 40万
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方案详情:
原子荧光光谱法测硒原理
试样经酸加热消化后,在盐酸介质中,将试样中的六价硒还原成四价硒,用硼氢化钾作还原剂,将四价硒在盐酸介质中还原成硒化氢(H2Se),由载气(氩气)带入原子化器中进行原子化,在硒空心阴极灯照射下,基态硒原子被激发至高能态,在去活化回到基态时,发射出特征波长的荧光,其荧光强度与硒含量成正比。
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NanoBrook产品应用-12-ZetaPALS
文献名: Structural, morphological and optical properties of Bi NPs obtained by laser ablation and their selective detection of L-cysteine 作者: Ramon Gabriel Teixeira Rosaa, Celso de Araujo Duartea , Wido Herwig Schreinera, Ney Pereira Mattoso Filhoa, Arandi Ginane Bezerra Jr.b, Andersson Barisonc, Fernanda Maria Marins Ocamposc a Departamento de Física, Universidade Federal do Paraná Centro Politécnico, CP 19044, 81531-990 Curitiba (PR), Brazil b Departamento Acadêmico de Física, Universidade Tecnológica Federal do Paraná, 80230-901 Curitiba (PR), Brazil c Departamento de Química, Universidade Federal do Paraná Centro Politécnico, CP 19081, 81531-990 Curitiba (PR), Brazil 摘要:In the present work we show the results of the investigation of the properties of bismuth nanoparticles (NPs) obtained by the laser ablation in water. The samples were characterized by various techniques: UV/vis spectroscopy, dynamic light scattering, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, nuclear magnetic resonance and zeta potential. The NPs were metallic and surface oxidated, exhibiting absorption peak at 257 nm due to the surface plasmon resonance. The interaction between the NPs and various amino acids was studied and revealed a selective sensibility to cysteine on a range of concentration from 80 to 720 μM, which we attribute to a dimerization of cysteine to cystine probably complexed to the nanoparticle surface by electrostatic interactions, leading to the modification of the NP absorption spectrum. 关键词:Bismuth; Nanoparticles; Laser ablation; Cysteine
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连华科技 医疗污水检测方案
医疗污水包含了多种细菌、重金属、有机溶剂及酸碱溶液等生化有毒有害物质。如上述物质直接排放,将会对自然生态及人类生活环境造成危害。我国对医疗污水有清晰的排放标准。连华科技对于《医疗机构水污染物排放标准GB18466-2005》中所涉及的参数,多款便携及实验室仪器及耗材可满足检测需求
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自然界中约有99%的微生物无法在实验室条件下培养纯化,对于环境或临床样本中的微生物群落研究,需要一种非培养依赖且同时覆盖多种微生物类型的检测技术,能对微生物群落进行种属水平的鉴定及定量分析,使得微生物鉴定更加全面、准确及高效。 华大智造基于自主研发的高通量测序平台和病原感染快速鉴定系统,开发出一套病原微生物检测整体解决方案,可实现在本地快速、准确、全面的对原始标本中的微生物进行分类鉴定,并自动出具分析结果,为感染性疾病的诊疗提供参考。同时,我们也提供多种病原微生物检测整体解决方案的组合,用户可根据需求灵活选择硬件及配套试剂耗材。
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4D-脂质组学高通量工作流程
Lipid profiling from complex lipid extracts can be a challenging and time consuming task. The high complexity of samples and co-elution of isobaric or isomeric compounds complicate the confident annotation of lipids. The presented 4D-Lipidomics workflow simplifies and streamlines the annotation and validation process using mobility-enhanced MS data.
医疗/卫生
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