2.2. Apparatus
The FTIR spectra were collected using a Cary 610/670 infrared
microspectrometer (America Varian). The powder X-ray diffraction
(XRD) patterns were collected with a D8 Advance X-ray diffractometer
(Bruker Co., Germany) from 5 to 50. The morphology
of the composites was recorded by Hitachi S-4800 microscope
(Japan) with ethanol spitting and then sonicated for 30 min. The
magnetic property was analyzed by using a vibrating sample magnetometer
(VSM, LDJ9600). An atomic absorption spectrometer
(AEEnit 700) with flame was used for testing lead and the instrumental
parameters were adjusted according to the manufacturer
recommendations. A continuous flow atomic fluorescence spectrometer
(AFS-3100) was employed for the method validation.
For atomic fluorescence spectrometer, the sample solutions were
analyzed under the following conditions: lamp current (30 mA),
atomizer height (8 mm), negative high voltage of the PTM
(300 V), flow rate of carrier gas (400 mL min1
), flow rate of shield
gas (900 mL min1
), injection volume (1 mL), read mode (peak
area). A permanent magnet was used for the isolation of the analytes
from the complicated matrix.
2.2. ApparatusThe FTIR spectra were collected using a Cary 610/670 infraredmicrospectrometer (America Varian). The powder X-ray diffraction(XRD) patterns were collected with a D8 Advance X-ray diffractometer(Bruker Co., Germany) from 5 to 50. The morphologyof the composites was recorded by Hitachi S-4800 microscope(Japan) with ethanol spitting and then sonicated for 30 min. Themagnetic property was analyzed by using a vibrating sample magnetometer(VSM, LDJ9600). An atomic absorption spectrometer(AEEnit 700) with flame was used for testing lead and the instrumentalparameters were adjusted according to the manufacturerrecommendations. A continuous flow atomic fluorescence spectrometer(AFS-3100) was employed for the method validation.For atomic fluorescence spectrometer, the sample solutions wereanalyzed under the following conditions: lamp current (30 mA),atomizer height (8 mm), negative high voltage of the PTM(300 V), flow rate of carrier gas (400 mL min1), flow rate of shieldgas (900 mL min1), injection volume (1 mL), read mode (peakarea). A permanent magnet was used for the isolation of the analytesfrom the complicated matrix.
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