liquid chromatography
analysis was performed by an Agilent HPLC system equipped with an
ultraviolet–visible detector (infinity two variable), a C18 reverse phase column (100 × 4.6 mm, 5.0 μm, 100
Å; NUCLEOSIL 100-5) at ambient temperature, a binary pump, and
a dual pump to separate and analyze cyclophosphamide. An Agilent 1260.0
UV–Vis diode array detector was set at 195 nm. Also, the volume
injection of the sample was 20.0 μL. A mixture solution of acetonitrile:sodium
phosphate buffer (70:30) (pH 4.0) was applied as an isocratic mobile
phase at a flow rate of 1.0 mL min–1.
MIL-53(Al)-NH2 was characterized by a Mira instrument (TESCAN, Czech Republic)
field emission scanning electron microscope, Perkin Elmer series spectrum
65 Fourier transform infrared (4000–400 cm–1) spectrometer (PerkinElmer, USA), and Rigaku Smartlab X-ray diffractometer
with Cu K radiation (Rigaku, Japan) to investigate the surface morphology
and physicochemical properties of synthesized MIL-53(Al)-NH2.
The sample and solutions were sonicated with a Tecno-Gaz
ultrasonic
bath (Parma, Italy) and homogenized with a ROTOFIX 32A centrifuge
(Westphalia, Germany) and a vortex mixer SA8 purchased from Stuart
Company (Padova, Italy). A digital pH meter (Mettler Toledo, Greifensee,
Switzerland) was supplied to adjust the acidity of urine samples.