【摘要】：目的對牛奶中硫氰酸鹽離子色譜測定法的樣品預(yù)處理方法和色譜條件進(jìn)行改進(jìn),提高方法的適用性。方法牛奶樣品用氫氧化鈉溶液加熱沉淀蛋白,以AS14陰離子交換柱分離,3.5 mmol/LNa2CO3~1.0 mmol/L Na HCO3溶液洗脫,電導(dǎo)檢測器檢測。結(jié)果硫氰酸鹽濃度在0.1mg/L~2.00 mg/L范圍內(nèi)線性良好,回歸方程y=1.314×10-6x+0.024,r=0.9997,最低檢出濃度0.8 mg/kg,精密度為1.5%~3.6%、加標(biāo)回收率為93.5%~101.6%。結(jié)論本方法簡便,快速,靈敏,適用于牛奶中的硫氰酸鹽的檢測。
[Abstract]:Objective to improve the sample pretreatment method and chromatographic conditions for the determination of thiocyanate in milk, and to improve the applicability of the method. Methods Milk samples were heated and precipitated with sodium hydroxide solution, separated by AS14 anion exchange column, eluted with 3.5 mmol/LNa2CO3~1.0 mmol/LNa HCO3 solution and detected by conductivity detector. Results the concentration of thiocyanate was linear in the range of 0.1mg/L~2.00 mg/L. The regression equation was y = 1.314 脳 10 ~ (- 6) x 0.024, r 鈮，

本文編號：2484042