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. |
原文由 kylabs(kylabs) 发表:
草甘膦有一个非衍生的方法:
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 acetateGradient 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%BPost 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.
Discussion
A reliable method for the determination of glyphosate is presented. Analysis was performed using a Cogent Diamond Hydride™ HPLC column which provides very reproducible retention and fast equilibration even when a gradient analysis is used. The use of LC-MS detection allows avoiding time consuming derivatization of this compound which is lacking a chromophore for UV detection. The method shown, with ANP retention avoids derivatization, which is required when an ordinary C18 column is used.