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图 1 停留光谱测定ABTS/DPD与PI的动力学演示图
Figure 1. The demonstration of stopped-flow spectrophotometer used to determine the kinetics of PI with ABTS or DPD
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图 2 ABTS(A)和DPD法(B)的显色机理
Figure 2. Color mechanism of the ABTS (A) and DPD method (B)
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图 3 不同浓度高碘酸根与ABTS(A)和DPD(B)反应后的吸收光谱
Figure 3. Absorption spectrum of the ABTS (A) and DPD reagents (B) after reacted with different PI concentrations
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图 4 反应时间对ABTS溶液(A)和DPD溶液(B)吸光度值的影响
Figure 4. Effect of reaction time on the absorbance values of ABTS solution (A) and DPD solution (B)
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图 5 (A)pH对ABTS溶液在415 nm处的吸光度值的影响;(B)pH对DPD溶液在551nm处的吸光度值的影响
Figure 5. (A) Effect of pH on the absorbance of ABTS solution at 415 nm;(B) Effect of pH on the absorbance of DPD solution at 551 nm
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图 6 (A)ABTS浓度对ABTS·+在415 nm处生成速率的影响;(B)ABTS浓度对ABTS溶液在415 nm处吸光度值的影响;(C) DPD浓度对DPD溶液在551 nm处吸光度值的影响
Figure 6. (A) Effect of ABTS concentration on the rate of ABTS·+ formation at 415 nm; (B) Effect of ABTS concentration on the absorbance at 415 nm; (C) Effect of DPD concentration on the absorbance at 551 nm
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图 7 ABTS法(A)和DPD法(B)测定高碘酸根的标准曲线
Figure 7. Standard curves for the ABTS (A) and DPD methods (B)
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图 8 ABTS·+(A)和DPD·+(B)自由基在不同水质背景中的稳定性试验
Figure 8. Stability test of ABTS·+(A) and DPD·+ (B) in different water matrixes
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8 ,Table
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