In the dilute H2SO4medium of c (H2SO4)0.090.16mol·L-1,trace amount of Cr2O2-7reacts with protonated 3.5-diCl-PADAP to form an ion-association complex having its maximum absorption at 553nm and a molar absorptivit...In the dilute H2SO4medium of c (H2SO4)0.090.16mol·L-1,trace amount of Cr2O2-7reacts with protonated 3.5-diCl-PADAP to form an ion-association complex having its maximum absorption at 553nm and a molar absorptivity of 4.51×104L·mol-1·cm-1.Beer’s law is obeyed in the range of 03.3μg.mL-1for Cr2O2-7.The method presented has been used in the determination of Cr2O2-7in water and tea.The recoveries obtained were in the range of 97.6%100%.展开更多
文摘In the dilute H2SO4medium of c (H2SO4)0.090.16mol·L-1,trace amount of Cr2O2-7reacts with protonated 3.5-diCl-PADAP to form an ion-association complex having its maximum absorption at 553nm and a molar absorptivity of 4.51×104L·mol-1·cm-1.Beer’s law is obeyed in the range of 03.3μg.mL-1for Cr2O2-7.The method presented has been used in the determination of Cr2O2-7in water and tea.The recoveries obtained were in the range of 97.6%100%.
