CAJ | 학술논문

通过配制不同浓度的糠醛溶液、油样萃取液、BHT溶液，采用光谱法检测发现变压器油中含有大量抗氧化剂二丁基羟基甲苯（BHT），BHT的存在严重干扰了糠醛在275nm处的吸收峰，无法通过直接检测油样萃取液而得知糠醛浓度。故通过在油样萃取液中加入一定量的2-硫代巴比妥酸（TBA）溶液，利用TBA与糠醛发生的显色反应来间接测量糠醛的浓度。结果表明：2-硫代巴比妥酸（TBA）溶液能有效排除BHT的干扰，TBA能与糠醛发生显色反应，在390 nm处出现新的吸收峰，峰高与糠醛浓度呈现良好的线性关系，说明TBA显色法能有效检测出变压器油中糠醛含量，同时很好克服了传统高效液相法过程繁琐、测量时间长等缺点，为变压器油中糠醛浓度检测提供了一种新思路。
통과배제불동농도적강철용액、유양췌취액、BHT용액，채용광보법검측발현변압기유중함유대량항양화제이정기간기갑분（BHT），BHT적존재엄중간우료강철재275nm처적흡수봉，무법통과직접검측유양췌취액이득지강철농도。고통과재유양췌취액중가입일정량적2-류대파비타산（TBA）용액，이용TBA여강철발생적현색반응래간접측량강철적농도。결과표명：2-류대파비타산（TBA）용액능유효배제BHT적간우，TBA능여강철발생현색반응，재390 nm처출현신적흡수봉，봉고여강철농도정현량호적선성관계，설명TBA현색법능유효검측출변압기유중강철함량，동시흔호극복료전통고효액상법과정번쇄、측량시간장등결점，위변압기유중강철농도검측제공료일충신사로。
Different concentration of furfural solution, extraction of transformer oil, and butylatedhydroxy-toluene (BHT) were prepared, and it was found that there was so much BHT in the transformer oil by spectroscopy. The existence of BHT would interfere the absorption peak of furfural at 275 nm, leading to the furfural content can’t be obtained by detecting the extraction of transformer oil directly. So TBA (2-thiobarbituric acid) solution was added into the extraction of transformer oil, and the furfural content can be measured through the chromogenic reaction between TBA and furfural indirectly. The results show that the TBA solution can exclude the interference of BHT. The TBA can react with furfural, and a new absorption peak appears at 390 nm. The peak height is liner with furfural content. The TBA colorimetry is not only effective to detect the furfural content in the transformer oil but also can overcome the com-plex measuring-process and time-consuming defects of high performance liquid chromatography (HPLC), which provides a new way for detection of furfural content in transformer oil.