Research of on-board analysis system for ultra-trace nitrite and ammonium in seawater [PDF]
, 2008 氮（包括氨氮、硝氮和亚硝氮）是海洋浮游植物生长所必需的物质基础，在海洋生物地球化学过程中扮演着重要角色。寡营养盐海域表层海水中亚硝氮和氨氮的浓度极低，通常在nM水平。现有的亚硝氮和氨氮测定方法已不能满足日益发展的海洋环境科学研究的需要，发展灵敏可靠的分析方法已成为研究的技术基础和迫切需求。本论文旨在研发灵敏度高、可靠性好、操作相对简单、可用于现场测定的超痕量亚硝氮和氨氮分析方法，主要内容和结果如下： （1）基于Griess反应原理，建立了海水中超痕量亚硝氮的顺序注射-固相萃取-分光光度检测方法 ...
陈国和
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Determination of ethylenediaminetetraacetic acid and nitrilotriacetic acid in water [PDF]
Objective: A high performance liquid chromatography method was developed to determine EDTA and NTA in water. Methods: The samples were derivatized with ferric chloride, used methanol and a 0.2 mmol/L tetrabutylammonium bromide phosphate buffer solution ...
WANG Xueting, ZHENG Bin
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Zhejiang Daxue xuebao. Lixue ban, 2007 采用MTT和SRB法研究了新型铂（Ⅱ）类配合物[Pt(Ⅱ)(NH3)（H2O)（C6H5-COO)2]（ZMC）对人体癌细胞的增殖抑制作用，又通过流式细胞法，Giemsa染色法、等离子体质谱法研究了它的抗癌机制.实验结果表明：配合物ZMC对HL-60、BGC-823以及EJ三种肿瘤细胞都表现出一定的活性，其对HL-60细胞的增殖抑制作用强度与顺铂相当，而对其它两种肿瘤细胞的增殖抑制作用强度略小于顺铂；阻止HL-60细胞G2+M→G1期的进行；在相同浓度情况下其与HL-60细胞的DNA的键合量大于顺铂.
ZHANGJin-chao(张金超) +4 more
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柱前衍生化高效液相色谱法测定2-去氧葡萄糖的含量 [PDF]
, 2011 目的建立柱前衍生化高效液相色谱法测定2-去氧葡萄糖(2-DG)含量的方法。方法采用1-苯基-3-甲基-5-吡唑酮(PMP)为柱前衍生化试剂,将2-DG在碱性条件下衍生化后直接进样测定。分离柱为HypersilODS2色谱柱(4.6 mm×250 mm,5μm),流动相为100 mmol·L-1醋酸铵缓冲液(pH 5.5)-乙腈(78∶22),流速1.0 mL·min-1,波长249 nm。结果 2-DG在19.68~393.6μg·mL-1浓度范围内与峰面积具有良好的线性关系(r=0.9997 ...
刘俊朋 +5 more
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Determination of glufosinate ammonium and three metabolites in urine by ultra performance liquid chromatography-tandem mass spectrometry [PDF]
BackgroudAt present, there is no unified standard for the detection of glufosinate ammonium and three metabolites in urine, which affects the accurate assessment of occupational exposure risk to a certain extent.
Baoli ZHU +7 more
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Improvement of electrochemical reduction device for detection of bromate in wheat flour [PDF]
, 2014 依据电解、电渗析和电迁移原理改进电化学还原装置,在不使用化学试剂的条件下,将待测样品组分中的br O-3还原为br-后进行检测,可避免高浓度Cl-的干扰。溴酸盐实样的检测表明,溴酸盐检出限为0.32 Mg/kg,日内精密度为2.73%,日间精密度为3.81%,回收率可达92%~96%。An electrochemical reduction device developed according to electrolysis,electrodialysis and electromigration ...
周莉莉, 胡荣宗, 董瑞, 黄维雄
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Improvement of the Method for Determining Total Nitrogen in Water Quality Using Alkaline Potassium Persulfate Ultraviolet Spectrophotometry [PDF]
Alkaline potassium persulfate (K2S2O8) ultraviolet (UV) spectrophotometry is the routine method to analyze total nitrogen (TN) in water and is important for studying pollutants in water and the geochemical cycling of TN.
Qianshu LU +5 more
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Research on Pre-Treatment Technology and Analysis Methods for Main Components in Soluble Potassium Salt [PDF]
Potassium salt is one of the scarcest mineral resources in China, and it is the main raw material for potassium fertilizer in the three major fertilizers of agriculture.
Hongbin SUN +4 more
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Zhongguo youzhi为提高植物油中4种维生素E异构体（α-、β-、γ-、δ-生育酚）的检测效率，建立一种超高效液相色谱-三重四极杆串联质谱法（UPLC-MS/MS）同时测定植物油中4种维生素E异构体含量的方法。分别对质谱条件、色谱条件及样品前处理条件进行了优化，并对检测方法进行了考察。结果表明：0.5 g样品经10 mL甲醇提取，35 mg C18粉末净化后，采用Kintex F5色谱柱（2.1 mm × 100 mm，1.7 μm）分离，以0.1%甲酸水溶液和0.1%甲酸-甲醇溶液为流动相梯度洗脱，流速0.4 mL ...
李彩玲1，张见1,2，刘元法1,3，王晓超1，梅东旭1 LI Cailing1, ZHANG Jian1,2, LIU Yuanfa1,3, WANG Xiaochao1, MEI Dongxu1
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Study on the Preparation of Ion-exchange Coatings for Stir Bar Sorptive Extraction Based on Monoliths and Its Extraction Performance [PDF]
, 2011 传统离子样品前处理技术主要为固相萃取（solid-phaseextraction，SPE）和膜萃取（membraneextraction，ME），这两种方法存在操作繁琐、萃取效率低和成本高等不足。搅拌棒固相萃取（stirbarsorptiveextraction，SBSE）是在固相微萃取（solid-phasemicroextraction，SPME）基础上发展起来的一种集萃取、富集、净化为一体的新型样品前处理技术。与传统的样品前处理方法相比，SBSE技术具有操作简便、有机溶剂使用量少 ...
林建斌
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