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6. 紫外可见吸收光谱法测定双组分混合物 PowerPoint Presentation
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6. 紫外可见吸收光谱法测定双组分混合物

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6. 紫外可见吸收光谱法测定双组分混合物 - PowerPoint PPT Presentation


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6. 紫外可见吸收光谱法测定双组分混合物. 一、实验目的. 1. 了解紫外可见分光光度计的结构及使用方法; 2. 学会用解联立方程组的方法定量测定吸收曲线相互重叠的双组分混合物。. 二、实验原理. 1. 双组分混合物吸收曲线(相互重叠情况). 2. 吸光度的加和性. 三、实验内容. 1. 吸收曲线的扫描. (1) 0.0008mol·L -1 K 2 Cr 2 O 7 吸收曲线 (390 ~ 650nm) λ 1 (max)=       nm ; A 1 (max)= 0.0016mol·L -1 K 2 Cr 2 O 7 吸收曲线 (390 ~ 650nm)

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6. 紫外可见吸收光谱法测定双组分混合物


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一、实验目的
  • 1.了解紫外可见分光光度计的结构及使用方法;
  • 2.学会用解联立方程组的方法定量测定吸收曲线相互重叠的双组分混合物。
slide3
二、实验原理

1.双组分混合物吸收曲线(相互重叠情况)

2.吸光度的加和性

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三、实验内容

1.吸收曲线的扫描

(1) 0.0008mol·L-1K2Cr2O7吸收曲线(390~650nm)

λ1(max)=       nm;A1(max)=

0.0016mol·L-1K2Cr2O7吸收曲线(390~650nm)

λ1(max)=       nm;A1(max)=

(2)0.0004mol·L-1KMnO4吸收曲线(395~655nm)

λ2(max)=       nm;A2(max)=

0.0006mol·L-1KMnO4吸收曲线(395~655nm)

λ2(max)=       nm;A2(max)=

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三、实验内容

2.标准曲线的绘制

(1) K2Cr2O7标准曲线(λ1=     nm,λ2=     nm,b=1cm,蒸馏水作参比)

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三、实验内容

2.标准曲线的绘制

(2) KMnO4标准曲线(λ1=     nm,λ2=     nm,b=1cm,蒸馏水作参比)

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四、实验结果处理

3.未知样的测定()号