-----------------------------------------------------------------
Assay
Weigh 0.4 mg of product and add this to 20 mL of mobile phase and go through ultrasonic extraction. To this solution, add mobile phase to 50 mL and this becomes test solution. Separately, weigh 20 mg of standard and add mobile phase to 100 mL. Take 4 mL of this solution and add mobile phase to 100 mL and this becomes standard solution. Take 10 ¥ìL of test solution and 10 ¥ìL of standard solution and go through testing according to LC method under the following condition to get peak areas AT and AS.
Amount of adenosine (C10H13N5O4 X Ar/As X 1/50 ) (§·)
= Amount of standard adenosine (§·)
Conditions
------------
Detector: UV spectro (measured wavelength 260 nm)
Column: Fill a stainless pipe (inner diameter 4.6 mm, length 15 cm) with 5 ¥ìm of
octadecylsilylized silica gel (used for liquid chromatograph)
Mobile phase: acetonitrile 10mM+ potassium dihydrogen phosphate = mixed solution (5:94)
Rate of flow: 0.8mL/minute
--------------------------------------------------------------