蓝人 2011/08/15
离子柱 甲醇水 缓冲盐 195 0.04 1.0
bearchild 2011/08/18
参考GBT 5750.9-2006
kylabs 2011/08/22
用[url=https://insevent.instrument.com.cn/t/Yp][color=#3333ff]液质[/color][/url]来做: [img]https://ng1.17img.cn/bbsfiles/images/2011/08/201108222149_311640_2254157_3.jpg[/img] [b]Method Conditions[/b] [table][tr][td][b]Column[/b][/td][td]Cogent Diamond Hydride™, 4µm, 100A[/td][/tr][tr][td][b]Catalog No.[/b][/td][td]70000-15P-2[/td][/tr][tr][td][b]Dimensions[/b][/td][td]2.1 x 150 mm[/td][/tr][tr][td][b]Solvents[/b][/td][td]A: DI water + 5 mM ammonium acetate B: 90% acetonitrile/10% DI water/10 mM ammonium acetate[/td][/tr][tr][td][b]Gradient[/b][/td][td]0.0 min ?80.0%B 1 .0 min 80%B 1.1 min to 5%B 5.0 min 5%B 6.0 min to 80%B[/td][/tr][tr][td][b]Post time[/b][/td][td]5 min[/td][/tr][tr][td][b]Flow rate[/b][/td][td]0.5 mL/min.[/td][/tr][tr][td][b]Sample Prep[/b][/td][td]Glyphosate: 168.0067m/z (M - H)- Figure A: injection #1, RT = 3.365 min Figure B: injection #5, RT = 3.366 min [size=1]Sample stock solution was purchased from Sigma (1000 mcg/mL). Sample for analysis was made by diluting the stock 1:100 in 30:70 solution A and B.[/size] [/td][/tr][tr][td][b]Detection[/b][/td][td]ESI ?neg - Agilent 6210 MSD TOF mass spectrometer.[/td][/tr][/table]
tianmao6971 2011/09/14
草甘膦的产品质量有国标,照着做就行了。我当时用的岛津LC-20AT单泵,这个方法比较亏柱子,建议买稍微好点的。个人感觉产品的含量还是比较好做的。
taoruo 2011/10/31
GB/T5750.9-2006中的标准,用柱后衍生方法做,阳离子交换柱,可以达到方法的检出限
kylabs
第10楼2011/08/22
用液质来做:
Method Conditions
Column | Cogent Diamond Hydride™, 4µm, 100A |
Catalog No. | 70000-15P-2 |
Dimensions | 2.1 x 150 mm |
Solvents | A: DI water + 5 mM ammonium acetate B: 90% acetonitrile/10% DI water/10 mM ammonium acetate |
Gradient | 0.0 min ?80.0%B 1 .0 min 80%B 1.1 min to 5%B 5.0 min 5%B 6.0 min to 80%B |
Post time | 5 min |
Flow rate | 0.5 mL/min. |
Sample Prep | Glyphosate: 168.0067m/z (M - H)- Figure A: injection #1, RT = 3.365 min Figure B: injection #5, RT = 3.366 min Sample stock solution was purchased from Sigma (1000 mcg/mL). Sample for analysis was made by diluting the stock 1:100 in 30:70 solution A and B. |
Detection | ESI ?neg - Agilent 6210 MSD TOF mass spectrometer. |