英语翻译GC–MSGC–MS was performed with an Agilent(Avondale,PA,USA) 6890N GC,equipped with a programmed-temperaturevaporizer (PTV) and an Agilent7683 autoinjector,coupled to an Agilent5973 mass-selective detector.MS withelectron-impact (EI) ion

英语翻译GC–MSGC–MS was performed with an Agilent(Avondale,PA,USA) 6890N GC,equipped with a programmed-temperaturevaporizer (PTV) and an Agilent7683 autoinjector,coupled to an Agilent5973 mass-selective detector.MS withelectron-impact (EI) ion
英语翻译
GC–MS
GC–MS was performed with an Agilent
(Avondale,PA,USA) 6890N GC,
equipped with a programmed-temperature
vaporizer (PTV) and an Agilent
7683 autoinjector,coupled to an Agilent
5973 mass-selective detector.MS with
electron-impact (EI) ionization (electron
energy 70 eV) was performed in selected
ion monitoring (SIM) mode.For each
pesticide two or three specific ions were
selected; these ions were sorted into
groups.The dwell time was 10 ms.
Retention times,target ions,qualifier
ions,start times of SIM groups for pesticides
and for the internal standard,and
frequency of data acquisition are listed
in Table 1.This method is referred to as
‘‘method 1,for calibration’’.
SIM,with fewer pesticides,was also
used for real sample analysis; the conditions
used for this method,referred to
as ‘‘method 2,for real samples’’,are
listed in Table 2.
The PTV was operated in solvent-vent
mode; the PTV temperature program
was 40 \2C (0.20 min),400 \2C min\11 to
300 \2C (2.00 min),400 \2C min\11 to
350 \2C (5.00 min).The flow through the
split valve was 50 mL min\11 and the split
valve was closed after 0.2 min.and
opened after 1.75 min.The column oven
temperature program was 60 \2C
(1.75 min),60 \2C min\11 to 150 \2C,
23.8 \2C min\11 to 300 \2C (1.90 min).The
injection volume was 2 lL,and after each
injection the syringe was washed with
MeCN.Helium of purity 5.0 (Linde
Technoplyn,Bratislava,Slovak Republic)
was used as carrier gas in constant flow
mode (1.2 mL min\11); at the initial oven
temperature the columnhead pressure was
234 kPa.Compounds were separated on a15 m · 0.15 mm i.d.(microbore) column
coated with a 0.15-lm film of CP-Sil 8 CB
(5% diphenyl 95% dimethylsiloxane;
Varian,Middelburg,The Netherlands).
The column was connected to a nonpolar
deactivated precolumn,or retention gap
(1 m · 0.32 mm i.d.) by means of a
0.32–0.2 mm press-fit connector (Agilent
Technologies,Basel,Switzerland) and
sealed with polyimide resin (Supelco,
Bellefonte,PA,USA).The precolumn was
used for sample focussing and to increase
the ruggedness of the system by protecting
the separation column from contamination
by matrix coextractants of low volatility.
The retention gap is easily changed
after several injections [5].

英语翻译GC–MSGC–MS was performed with an Agilent(Avondale,PA,USA) 6890N GC,equipped with a programmed-temperaturevaporizer (PTV) and an Agilent7683 autoinjector,coupled to an Agilent5973 mass-selective detector.MS withelectron-impact (EI) ion
GC-MS
GC-MS是以 Agilent 运行
(Avondale 、 PA,美国)6890N GC,
装备一规划-温度
汽化器 (PTV) 和 Agilent
7683个自我注射器,对 Agilent 加倍
5973个块-选择的发现者.MS与
电子-冲击 (EI) 离子化 (电子
能源 70个电子伏) 是运行在挑选的
离子监听 (模拟游戏) 模态.为每个
杀虫剂二或三个特性离子是
挑选的; 这些离子是分类进入
小组.那居住时间是 10 ms.
保持时代、目标离子,给与资格的人
离子,开始时代模拟游戏小组为杀虫剂
而且为内在的标准,和
数据获得的频率列出
在表 1.这一个方法是提及当做
'' 方法 1,为口径测定''.
藉由少的杀虫剂的模拟游戏也是
二手的为真正的样品分析; 情况
二手的为这一个方法,提到到
作为 '' 方法 2,为真正的样品',是
列出的在表 2.
PTV 是在溶剂中操作-排气口
模态; PTV 温度计画
是 40C(0.20 分钟),400C 最小1 到
300C(2.00 分钟),400C 最小1 到
350C(5.00 分钟).流程完成的那
劈开活瓣是 50个毫升最小1 和那劈开
活瓣是关闭在 0.2 分钟之后.而且
打开在 1.75 分钟之后.专栏烤箱
温度计画是 60C
(1.75 分钟),60C 最小1-150C,
23.8C 最小1-300C(1.90 分钟).那
注入体积是 2 lL,和在每个之后
注入注射器是洗与
MeCN.纯净 5.0 的氦 (Linde
Technoplyn 、布拉第斯拉瓦,斯洛伐克人共和国)
在常数中当做运送者瓦斯被用流程
模态;(1.2个毫升最小1) 在起始烤箱
温度 columnhead 压力是
234 kPa.化合物是在 15 m 上分开 · 0.15 毫米 i.d.(microbore) 专栏
涂上一层的与一个 CP-Sil 8 CB 的 0.15 lm 的电影
(5% diphenyl 95% dimethylsiloxane;
Varian 、 Middelburg,荷兰).
专栏是连接到一非两极的
解除动员 precolumn了,或保持缝隙
(1 m · 0.32 毫米 i.d.) 藉由一
0.32-0.2 毫米杂志报纸-适宜的联编者 (Agilent
技术、巴塞尔,瑞士) 和
密封的与聚醯亚胺树脂 (Supelco,
Bellefonte 、 PA,美国).precolumn 是
二手的为样品 focussing 和到增加
系统的高低不平藉由保护
来自污染的分离专栏
被低点挥发性的点阵式 coextractants.
保持缝隙容易地被改变
在一些注入 [5] 之后.