主题:【转帖】美国拟制订草甘膦最大残留限量

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Method Conditions

ColumnCogent Diamond Hydride™, 4µm, 100A (Microsolv公司)
Catalog No.70000-15P-2
Dimensions2.1 x 150 mm
SolventsA: DI water + 5 mM ammonium acetate
B: 90% acetonitrile/10% DI water/10 mM ammonium acetate
Gradient0.0 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 time5 min
Flow rate0.5 mL/min.
Sample PrepGlyphosate: 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.
DetectionESI � neg - Agilent 6210 MSD TOF mass spectrometer.
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