A kind of assay method of iron content in 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide
A determination method, the technology of phosphophenanthrene, which is applied in the direction of color/spectral characteristic measurement, etc., to achieve the effect of improved safety factor, less interference, and reduced operation process
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Embodiment 1
[0015] Testing conditions: TAS-986 Beijing General Analysis Atomic Absorption Spectrophotometer, flame method, air-acetylene flame, air outlet pressure 0.24Mpa, acetylene cylinder outlet pressure 0.05Mpa, acetylene flow rate 1400mL / min, wavelength 248.3nm, spectral bandwidth 0.2nm, lamp current 4.0mA, burner height 10mm. The filter coefficient is 0.6, and the integration time is 3 seconds. Use deuterium lamp buckle background.
[0016] Sample preparation: Weigh 1g (accurate to 0.1mg) sample, dissolve the sample with 50mL ethanol and quantitatively transfer it to a 100mL volumetric flask, add 2ml hydrochloric acid, shake well, then dilute to volume with secondary water, and prepare a blank solution at the same time. Select 5# sample and prepare 8 parallel samples.
[0017] Experiment: Pipette 0.00mL, 1.00mL, 2.00mL, 4.00mL, 6.00mL, 8.00mL, 10.00mL iron standard solution (40ug iron standard / mL) into 100mL volumetric flask, add 50mL ethanol, 2ml hydrochloric acid (GR), Make up...
Embodiment 2
[0021] Detection conditions: TAS-986 Beijing General Analysis Atomic Absorption Spectrophotometer, flame method, air-acetylene flame, air outlet pressure 0.24Mpa, acetylene cylinder outlet pressure 0.05Mpa, 1400mL / min, wavelength 248.3nm, spectral bandwidth 0.2nm , lamp current 4.0mA, burner height 10mm. The filter coefficient is 0.6, and the integration time is 3 seconds. Use deuterium lamp buckle background.
[0022] Linear equation experiment: pipette 0.00mL, 1.00mL, 2.00mL, 4.00mL, 6.00mL, 8.00mL, 10.00mL iron standard solution (50ug iron standard / mL) into 100mL volumetric flask, add 50mL ethanol, 2ml hydrochloric acid (GR ), and dilute to volume with secondary water. The absorbance value was measured under the same conditions. Perform linear regression on the iron ion concentration C with the absorbance value A of the solution, the regression equation is A=0.0644C+0.0066, and the correlation coefficient R=0.9976 (n=7).
[0023] Sample preparation: Weigh 1g (accurate t...
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