共查询到19条相似文献,搜索用时 93 毫秒
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高效液相色谱-质谱甄别七种化学战剂相关化合物 总被引:1,自引:0,他引:1
建立了高效液相色谱-质谱(HPLC-MS)甄别7种化学战剂相关化合物的分析方法,采用C18柱分离了包括酸性、中性和碱性在内的7种化学战剂相关化合物,选择离子监测法(SIM)测定这7种化合物的检出限在0.01—1mg/L之间。利用HPLC~APCI^ MS测定了4种土壤中的双(2-羟乙基)亚砜,此方法回收率大于93%,相对标准偏差(RSD)小于4%. 相似文献
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发胶中四氯乙烯的气相色谱分析张炳坤,史晓滨,齐力汇,王风鸣(山东省卫生防疫站,济南250014)四氯乙烯可与多种有机溶剂混溶,在发胶的生产中,可能被用作雾化剂。但由于其本身的毒性,会对人体造成伤害。因此在化妆品生产中被列为禁用物质 ̄[1]。发胶中的四... 相似文献
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烟草中烟碱的气相色谱分析 总被引:3,自引:0,他引:3
对烟草中烟碱分析多采用分光光度法和重量法,这些方法操作繁杂,分析周期长。采用气相色谱法分析,近年来已有不少论文发表。本文对几种固定相进行了比较。选择合适的固定相,可使操作简便、快速,结果准确,用于批量烟草中烟碱的测定省时、省力。 相似文献
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高枝荣;艾云龙;刘建林 《应用化学》2024,(11):1552-1564
在线气相色谱分析技术,是通过在线采样系统将化工工艺物料传送至前处理系统,通过预处理系统将粉尘及腐蚀性化合物等干扰物去除,然后输送到气相色谱仪,经色谱分离、检测并获取关键色谱数据,最后通过数据处理平台进行色谱数据的自动处理、远程发送以及报警联锁等功能的一门多学科交叉分析技术。从应用角度来分类,主要包括3个方面:微反(微反应器)在线气相色谱分析技术、实验室在线气相色谱分析技术和工业色谱分析技术。本文回顾了在线气相色谱技术的发展历程,重点介绍了笔者从业20年的在线气相色谱分析技术研发与应用,以及在线气相色谱分析技术的难点、机遇与挑战,并对国产在线气相色谱分析技术的发展进行了展望。 相似文献
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Jin Young Lee Yong Han Lee Yong Gwan Byun 《Phosphorus, sulfur, and silicon and the related elements》2013,188(5):641-649
Abstract A new (E)-pyrene-1-carbaldehyde O-tert-butyldimethylsilyl oxime 3 was synthesized for the detection of chemical warfare nerve agents, O-isopropyl methylphosphonofluoridate (GB) and O-pinacolyl methylphosphonofluoridate (GD). 1H NMR spectrum showed that the tert-butyldimethylsilyl (TBDMS) group was deprotected using TBAF and the oximate supernucleophile was made. Upon addition of chemical warfare agents (GB and GD) (50 mol%), the reaction was completely finished within 5 min and also the color change of reaction mixture was observed under a hand-held UV lamp with the naked eye. 相似文献
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西红柿、卷心菜中残留丙溴磷的提取及气相色谱-火焰光度检测法分析 总被引:13,自引:0,他引:13
报道了一种简便、快速的西红柿、卷心菜中丙溴磷的提取净化及测定方法。采用丙酮 正己烷 (体积比为 1∶1)提取西红柿、卷心菜中的丙溴磷 ,经活性炭净化后 ,用气相色谱 火焰光度检测法直接测定其含量。丙溴磷在西红柿、卷心菜中的加标回收率分别为 96 .2 %~ 10 5 .9% ,94.7%~ 10 2 .3% ,RSD分别为 3.7%~ 4.9% ,3.7%~5 .0 %。西红柿、卷心菜中丙溴磷的最低检出限为 0 .0 6mg/kg。 相似文献
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Jon A. Ashley Chao-Hsiung Lin Peter Wirsching Kim D. Janda 《Angewandte Chemie (International ed. in English)》1999,38(12):1793-1795
Methylphosphonic acid (MPA) is the degradation product of many chemical warfare agents. The convenient detection of this substance would aid in field testing to confirm illicit manufacture and use of banned chemical weapons. Efficient functionalization of MPA with an aromatic diazo compound allowed binding by monoclonal antibodies elicited by using an analogous hapten (see scheme). An ELISA assay was rapid, sensitive, and specific. 相似文献
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《Electroanalysis》2003,15(14):1149-1159
After the September 11 tragedies of 2001, scientists and law‐enforcement agencies have shown increasing concern that terrorist organizations and their “rogue” foreign government‐backers may resort to the use of chemical and/or biological agents against U.S. military or civilian targets. In addition to the right mix of policies, including security measures, intelligence gathering and training for medical personnel on how to recognize symptoms of biochemical warfare agents, the major success in combating terrorism lies in how best to respond to an attack using reliable analytical sensors. The public and regulatory agencies expect sensing methodologies and devices for homeland security to be very reliable. Quality data can only be generated by using analytical sensors that are validated and proven to be under strict design criteria, development and manufacturing controls. Electrochemical devices are ideally suited for obtaining the desired analytical information in a faster, simpler, and cheaper manner compared to traditional (lab‐based) assays and hence for meeting the requirements of decentralized biodefense applications. This articler presents a review of the major trends in monitoring technologies for chemical and biological warfare (CBW) agents. It focuses on research and development of sensors (particularly electrochemical ones), discusses how advances in molecular recognition might be used to design new multimission networked sensors (MULNETS) for homeland security. Decision flow‐charts for choosing particular analytical techniques for CBW agents are presented. Finally, the paths to designing sensors to meet the needs of today's measurement criteria are analyzed. 相似文献
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气相色谱–火焰光度法测定进口天然气中4种形态硫 总被引:1,自引:0,他引:1
建立气相色谱–火焰光度法测定进口液化天然气中4种形态硫的方法。探讨了色谱柱、进样口温度、分流比、柱流速、升温程序和FPD检测器等对测定结果的影响。在优化的实验条件下,评价了方法的可靠性。4种形态硫化物的质量浓度在10.0~200.0μg/L范围内,其对数与峰面积对数呈良好的线性关系,线性相关系数r在0.983 3~0.999 2之间,检出限为1.7~7.7μg/L,测定结果的相对标准偏差为0.56%~0.68%(n=5)。用该法测定天然气形态硫标准气体,测定值与标准值相比,相对误差为–1.6%~–1.2%。该方法具有较高的准确度,可应用于进口天然气中4种形态硫的分析。 相似文献