热点应用丨赛里安GCMS结合EST FLEX2液体模块测定生活饮用水中的乙草胺-医疗器械网

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热点应用丨赛里安GCMS结合EST FLEX2液体模块测定生活饮用水中的乙草胺

来源：天美仪拓实验室设备（上海）有限公司分类：促销 2023-11-20 10:03:19 15阅读次数

前言

乙草胺是一种在世界范围内广泛应用的除草剂，具有较好的水溶性和流动性，可以通过降雨、渗透、灌溉等方式进入水体，对水体造成长期和不可逆的污染，对人体健康以及环境安全存在着较大的威胁。

在新颁布的《生活饮用水标准》GB/T 5750-2022中，新增加了乙草胺的检测，本方案按照标准采用C18固相萃取柱萃取，乙酸乙酯洗脱，洗脱液经脱水、浓缩后搭配GCMS法进行测定，结果稳定可靠，符合国家标准要求。

实验部分

仪器配置

赛里安 436i-eSQ气质联用仪

EST FLEX2三合一自动进样器

分析条件

▼ GCMS条件

结果与讨论

标准图谱

乙草胺标准物质总离子流图如图1所示。

▲ 图1 乙草胺TIC色谱图

标准曲线

使用甲醇试剂配制环乙草胺标准系列，系列溶液中各化合物的质量浓度分别为10、25、50、100、150、200、250ug/L以浓度为横坐标，峰面积为纵坐标，制作标准曲线。乙草胺的标准曲线如图2所示。

▲ 图2 乙草胺标准曲线图

标准曲线R2及重现性

乙草胺峰面积RSD%≤0.5%(n=5)，保留时间RSD%≤0.5%(n=5)，结果详见表1。结果表明该方法的灵敏度高，重复性好。

▼ 表1 环氧氯丙烷曲线R2与RSD%

结论

本应用介绍了赛里安(SCION)气质联用仪搭配EST FLEX2三合一自动进样器中液体进样模块，对生活饮用水中乙草胺的快速检测方法。该方法具有灵敏度高，重现性好，线性好，检测结果准确可靠以及操作方便等优点，同时完全满足生活饮用水标准中对其的测定要求。

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热点应用丨赛里安GCMS结合EST FLEX2液体模块测定生活饮用水中的乙草胺

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[8]未定义数组索引: page
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[2]Declaration of app\common\model\News::getAllList($filter = Array, $limit = 16, $order = Array, $with = Array) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[2]Declaration of app\common\model\Company::getAllList($filter = Array, $limit = 20) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[8]未定义数组索引: center
[8]Only variables should be passed by reference
[2]Declaration of app\common\model\NewsComment::getAllList($filter = Array, $limit = 16) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[8192]Function create_function() is deprecated
[8192]Function create_function() is deprecated
[8]未定义数组索引: area
[8]未定义数组索引: st
[2]Declaration of app\common\model\Topic::getList($filter = Array) should be compatible with app\common\model\BaseModel::getList($filter = Array, $sort = Array)
[2]Declaration of app\common\model\Topic::getAllList($filter = Array, $field = 'id,md5,tit...', $limit = 0) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[2]Declaration of app\common\model\TopicInfoList::getAllList($filter = Array, $limit = 8) should be compatible with app\common\model\BaseModel::getAllList($filter = Array, $with = Array, $limit = 0, $sort = Array, $field = 'a.*', $join = Array)
[8]未定义数组索引: center
[8]未定义数组索引: cid
[8]未定义数组索引: cid
[8]未定义数组索引: cid
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[8]未定义数组索引: cid
[8]未定义数组索引: cid
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[8]未定义数组下标: 0
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[ SQL ] SHOW COLUMNS FROM `user` [ RunTime:0.001365s ]
[ SQL ] SELECT `a`.* FROM `user` `a` INNER JOIN `news` `b` ON `a`.`id`=`b`.`user_id` GROUP BY `a`.`id` ORDER BY `b`.`id` DESC LIMIT 10 [ RunTime:0.010432s ]
[ SQL ] SELECT * FROM `user_info` WHERE `user_id` IN (348,351,466,458,209,372,521,819,385,657) [ RunTime:0.000821s ]
[ SQL ] SHOW COLUMNS FROM `seo` [ RunTime:0.001490s ]
[ SQL ] SELECT * FROM `seo` WHERE `column_type` = '02' AND `page_type` = 'news' AND `info_id` = 2499 LIMIT 1 [ RunTime:0.000201s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 2499 [ RunTime:0.001797s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 7749 [ RunTime:0.001793s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 7664 [ RunTime:0.001869s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 7608 [ RunTime:0.001963s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 7607 [ RunTime:0.001881s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 7350 [ RunTime:0.001835s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 6084 [ RunTime:0.001821s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 6021 [ RunTime:0.001808s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 5663 [ RunTime:0.001768s ]
[ SQL ] SELECT * FROM `news_belong_category` WHERE `news_id` = 5322 [ RunTime:0.001735s ]
[ SQL ] SELECT * FROM `user` WHERE `id` = 714 LIMIT 1 [ RunTime:0.000224s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 348 LIMIT 1 [ RunTime:0.000225s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 348 LIMIT 1 [ RunTime:0.000193s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 351 LIMIT 1 [ RunTime:0.000216s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 351 LIMIT 1 [ RunTime:0.000192s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 466 LIMIT 1 [ RunTime:0.000161s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 466 LIMIT 1 [ RunTime:0.000198s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 458 LIMIT 1 [ RunTime:0.000170s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 458 LIMIT 1 [ RunTime:0.000133s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 209 LIMIT 1 [ RunTime:0.000191s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 209 LIMIT 1 [ RunTime:0.000163s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 372 LIMIT 1 [ RunTime:0.000134s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 372 LIMIT 1 [ RunTime:0.000129s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 521 LIMIT 1 [ RunTime:0.000129s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 521 LIMIT 1 [ RunTime:0.000134s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 819 LIMIT 1 [ RunTime:0.000132s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 819 LIMIT 1 [ RunTime:0.000154s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 385 LIMIT 1 [ RunTime:0.000136s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 385 LIMIT 1 [ RunTime:0.000220s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `follow_user_id` = 657 LIMIT 1 [ RunTime:0.000147s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `user_follow` WHERE `user_id` = 657 LIMIT 1 [ RunTime:0.000198s ]

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