碳量子点双光法检测溶液中的钴离子

Carbon Quantum Dots Detect Cobalt Ions in Solution Using Double Light Detection Method

发现合成的碳量子点加入钴离子后溶液变成绿色,在650 nm处有紫外吸收,适用检测范围为0.8~35 mmol/L,方程式为y=0.007 46x+0.219 51,R^(2)=0.998 2;当钴离子浓度为0.04~6 mmol/L能猝灭碳量子点的荧光,浓度的对数与F_(0)/F比值呈现线性相关系数R^(2)=0.996,线性方程为:y=0.565 3x+1.739 6。因此,当钴离子浓度为0.8~6.0 mmol/L时,此碳量子点能达到双光法检测溶液中的钴离子,通过加标回收自来水样验证双光法检测有效。

It was found that the synthesized carbon QDs turned green after the solution was added with cobalt ions,with UV absorption at 650 nm,suitable for detection concentration of 0.8 to 35 mmol/L,the equation was y=0.007 46x+0.219 51,R~2=0.998 2.When the cobalt ion concentration of 0.04 to 6 mmol/L could quench the fluorescence of carbon quantum dots,the logarithm of the concentration was rendered linear with the F_0/F ratio,R~2=0.996,and the linear equation was y=0.565 3x+1.739 6.Therefore,when the cobalt ion concentration was 0.8 to 6.0 mmol/L,the carbon quantum dot could reach the double light detection of cobalt ions in the solution,and the double light detection method was used to verify the recovery of tap water samples.