Results 11 to 20 of about 3,566 (162)
Determination of Salt Forms of New Psychoactive Substances by Ion Chromatography [PDF]
, 2021 Objective To establish an ion chromatography method for the salt form determination of new psychoactive substances （NPS）. Methods The method of conducting qualitative and quantitative analysis of six types of organic acid ions （acetate ion, tartrate ion,
CHEN Yue-meng, HUA Zhen-dong, LIU Cui-mei, et al.
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Se pu = Chinese journal of chromatography, 2023 建立了快速溶剂萃取-离子色谱-质谱法测定人体血液、尿液中氟乙酸的方法。以去离子水为萃取溶剂,使用快速溶剂萃取仪处理血液和尿液样品,取上清液依次经超滤管和0.22 μm水相针式滤膜净化,稀释50倍后进样检测。采用Ion Pac AS20离子色谱柱以15.0 mmol/L的KOH溶液为淋洗液进行等度淋洗,流出液通过抑制器后进入三重四极杆质谱,在负离子、多反应监测模式下检测,外标法定量。结果表明,氟乙酸在0.5~500.0 μg/L范围内线性关系良好(r>0.999),检出限和定量限分别为0.14、0.47 ...
Yuheng Wang +6 more
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Determination of eight anions in liquid milk [PDF]
, 2023 Objective： A rapid method was established for the simultaneous determination of variety anions in liquid milk. Methods： The macromolecular protein in liquid milk was precipitated by acetonitrile, and a variety of anions were extracted. After purification
HE Minheng +4 more
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Research on Fingerprint of Lentinan Composition by Microwave Hydrolysis-Ion Chromatography [PDF]
, 2021 A microwave hydrolyzation-ion chromatography method for the determination of lentinan monosaccharide composition was established.Conditions of microwave hydrolysis of polysaccharide: the concentration of trifluoroacetic acid was 3.0 mol/L.The hydrolysis ...
FAN Liu-ping +5 more
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Development of an analytical method to detect cyanide in Chinese liquor by ion chromatography with pulsed amperometric detection [PDF]
, 2020 Objective This study aimed to develop an ion chromatography-pulse amperometry (IC-PAD) technique for the identification and quantification of cyanide in Chinese liquor. Methods The real samples from local markets were diluted to 1∶10 with ultrapure water
Hongjian MIAO +5 more
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Zhejiang Daxue xuebao. Lixue ban, 2005 采用阴离子交换分离，化学抑制模式，对甲醇、乙腈、异丙醇等有机溶剂中的阴离子进行测定.各有机溶剂稀释1倍直接进样可以测定Cl-、，在所采取的色谱条件下，三种阴离子都具有很好的线性和较低的检测限.比较采用自动再生循环模式，利用化学抑制模式的离子色谱法是一种检测有机物中阴离子的高效、准确的方法.
GUOYing-ying(郭莹莹) +2 more
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Zhejiang Daxue xuebao. Lixue ban, 2007 用离子色谱和电感耦合等离子体质谱联用法同时测定样品中三价铬和六价铬.经ICS-AG 14 A(Dionex，USA）阴离子色谱柱分离，60 mmol/L HNO3淋洗液淋洗，用等离子体质谱仪(m/z 50，52和53）在线测定了Cr( Ⅲ)和Cr(Ⅵ), 并对影响测定的各种因素进行了研究，该方法可以在2 min内分离并测定Cr（ Ⅲ）和Cr( Ⅵ). Cr（ Ⅲ）和Cr(Ⅵ)的检出限（S/N=3，m/z 53）分别为0.05 µg/L和0.5 µg/L.线性范围(m/z 53)从0.5 µg/L到500
ZHUMin(朱敏) +4 more
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亚油酸分离纯化技术研究进展Progress on separation and purification technology of linoleic acid
Zhongguo youzhi, 2022 亚油酸属ω-6型多不饱和脂肪酸，具有独特的生理功能，与人体健康密切相关。由于亚油酸大多来源于天然动植物油脂，其含量尚不能满足食品和制药业的需求，有效分离纯化亚油酸已成为近年来的研究热点。为给亚油酸的分离纯化研究提供参考，综述了近年来国内外亚油酸分离纯化技术的研究进展，系统介绍了尿素包合法、硝酸银硅胶柱色谱法、分子蒸馏法、脂肪酶酶解法、溶剂冷冻结晶法、高速逆流色谱法及耦合法的分离原理及研究成果，并分析了各分离纯化方法的优缺点。两种或多种分离纯化技术耦合可优势互补，提高分离效率，淀粉 ...
白希，陈爽，周灿兰，柏茹梦，平宇杰，杜为军 BAI Xi，CHEN Shuang, ZHOU Canlan，BAI Rumeng, PING Yujie, DU Weijun
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Zhejiang Daxue xuebao. Lixue ban, 2009 建立了以甲基磺酸(MSA)和乙腈混合淋洗,离子交换色谱分离,非抑制电导检测,分析分离啤酒中阳离子和胺类化合物的方法.色谱条件经优化,在25 min内分离出啤酒中的7种阳离子和胺类化合物,方法的回收率和相对标准偏差分别为94.31%~109.9%和0.10%~1.2%.
HANXiao-jiang(韩小江) +2 more
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Determination of trace anions in hydrogen peroxide by electrolysis treatment(电子级过氧化氢中痕量阴离子的离子色谱法测定)
Zhejiang Daxue xuebao. Lixue ban, 2004 为了防止过氧化氢对色谱分离柱产生损害，通常要用铂加入法进行过氧化氢自催化处理后才能测定溶液中的阴离子含量.但这种前处理方法既费时，加热过程也带来一定的污染.本文釆用铂催化、电解作用相结合的样品前处理方法和离子色谱法，测定过氧化氢中F-，Cl-，NO3-， SO42-，PO43-等阴离子，所测各离子的线性关系、相对标准偏差较好，检测限分别为0. 12，5. 12，1. 34，0. 39，3. 49 µg/L.该方法可以应用于电子级过氧化氢的测定. 测定结果令人满意.
YEMing-li(叶明立) +4 more
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