Page 220 - Analytical method for food addtives

10
V, sensitivity
3 electrodes,
electrode at
reference
nA
is 50
0.90
H 2 O (60:25:15). Flow rate
Isocratic CH 3 CN–THF–
0.9 mL/min
(250 × 4 mm, 5 µm)
Lichrocart RP18
filtered through 0.45 µm filter. 20 µL
Samples prepared in mobile phase.
Solutions filtered through 0.45 µm
Extracted with acetonitrile–2- 6 UV at 280 nm Gradient elution system of CrestPac C18S 5 % acetic acid and mm) (4.6 × 150 propanol–ethanol (2:1:1). Extract in MeOH–acetonitrile (50:50). freezer for 1 h then filtered. Filtrate Flow rate 1 mL/min concentrated under vacuum. 10 µL injected 7 Electrochemical Water–MeOH (10:90), Kr
filter. 20 µL injected
injected

Foods Foods and drugs Edible oils Dairy products and dietetic supplements Foods

HPLC LC LC LC HPLC-ECD