摘要
本文用间接液相色谱电化学的方法对非电活性的酯类混合物甲酸甲酯、甲酸乙酯、乙酸甲酯和乙酸乙酯进行了分离和测定,其线性范围分别是3.2×10^(-9)～4.4×10^(-8)mol、2.4×10^(-9)～2.8×10^(-8)mol、2.0×10^(-9)～4.0×10^(-8)mol和2.2×10^(-9)～2.4×10^(-8)mol。对甲酸甲酯8次平行测定的相对标准偏差为0.89％。
The method of indirect electrochemical detection accompanied with liquid chromatography (Indirect LCEC) was applied to separate and determine the non-electroactive esters containing methyl formate, ethyl formate , methyl acetate and ethyl acetate. It was shown that the peak current was linear in the range of 3. 2×10-9~4. 4×10-8mol , 2. 4× 10-9~2. 8×10-8 mol, 2. 0×10-9-4. 0×10~8 mol and 2. 2×10-9-2. 4X 10-8 mol for these four compounds, respectively. The relative standard deviation of eight parallel determination is 0. 89 %. The method was applied to determine the concentration of methyl formate in waste water, the recovery was in the range of 97% to 108%. The mechanism of indirect electrochemical detection of non-electroactive species is also discussed. The indirect electrochemical approach greatly expands the usage of electrochemical method, so that a variety of non-electroactive species can also been determined.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第4期468-471,共4页
Chemical Journal of Chinese Universities
关键词
液相色谱
电化学
酯
测定
Indirect LCEC, Non-electroactive species, Mobile phase additive, Determination of ester
