凯氏定氮仪联合液相色谱法测定香菇中甲醛含量

Determination of the formaldehyde in Lentinula edodes by automatic Kjeldahl apparatus combined with liquid chromatography

中文关键词:  香菇  甲醛  定氮仪  液相色谱法

英文关键词:Lentinula edodes  formaldehyde  automatic Kjeldahl apparatus  liquid chromatography

中文摘要:

      目的 建立全自动定氮仪和液相色谱仪检测分析香菇中甲醛的含量。方法 利用全自动定氮仪全封闭的有利条件, 利用水浴方法析出香菇中甲醛, 利用液相色谱仪测定甲醛含量。结果 香菇中甲醛的检测优化条件为蒸馏4 min, 水浴温度为60 ℃, 水浴时间为60 min。当甲醛浓度为0.0~10.0 mg/kg时, 标准曲线线性关系良好, 相关系数r为0.9995, 加标回收率为73.0%~107.3%。结论 凯氏定氮仪联合液相色谱法能够快速检测香菇中甲醛含量, 并且准确度高。

英文摘要:

      Objective To establish a method for determination of formaldehyde in Lentinula edodes by automatic Kjeldahl apparatus combined with liquid chromatography. Methods The formaldehyde was collected by automatic Kjeldahl apparatus, and the content of formaldehyde in Lentinula edodes was detected by liquid chromatography. Results The optimized conditions for determination of formaldehyde in Lentinula edodes were as follows: distilling time was 4 min, bath temperature was 60 ℃, and bath time was 60 min. When the contents of formaldehyde were 0.0~10.0 mg/kg, the standard curve had a good linear relationship, and the correlation coefficient was 0.9995. The recoveries were 73.0%~107.3%. Conclusion The method of automatic Kjeldahl apparatus combined with liquid chromatography is proved, which can rapidly and accurately detect the content of formaldehyde in Lentinula edodes.