摘要
根据传统挥发酚检测方法——4-氨基安替比林分光光度法的原理,开发出一种简便、实用的挥发酚在线蒸馏-检测系统。在蒸馏温度为130℃,进样量为2.00 mL/min条件下,吸光度与酚质量浓度的线性方程为A=0.004 5ρ＋0.005 7,线性检测范围在1.00～180.00 mg/L,检出限为0.81 mg/L,相对标准偏差为3.5%（10.00 mg/L,n=8）和2.8%（35.00 mg/L,n=8）,实际污水的加标回收率在99.8%～104.0%。同时将显色反应中带有刺激性气味的氨-氯化铵缓冲液替换为p H=10.5的氢氧化钠溶液,检测结果没有发生明显变化。
Based on the principle of color-reaction of phenol with 4-amino-antipyrine, a simple and practical measuring system for volatile phenols, named as on-line distillation-detection system, is developed. When the onlinedistillation temperature is 130 C and sample quantity is 2. 00 mL/min, the linear equation between absorbance and phenol content is A =0. 004 5p ＋0. 005 7 with the linear detection range of 1.00 - 180. 00 mg/L and detection limit of 0. 81 mg/L. The relative standard deviation is 3.5% for 10. 00 mg/L of volatile phenols （ n = 8 ） and 2. 8% for 35.00 mg/L of volatile phenols （ n = 8 ）. The recoveries of standard additions for actual sewage are 99. 8% - 104. 0%. Meanwhile,the ammonia-ammonium chloride buffer with irritating odor in the chromogenic reaction is replaced with sodium hydroxide （pH = 10. 5 ） in this paper. Test results have not been obviously affected.
出处
《现代化工》
CAS
CSCD
北大核心
2016年第11期204-207,共4页
Modern Chemical Industry
基金
国家自然科学基金(21376264)
关键词
在线蒸馏
在线检测
挥发酚
含酚污水
online-distillation
online-detection
volatile phenols
phenolic wastewater
