全自动食品甲醛分析仪的研制及应用

Development and Application of an automatic analysis instrument for detection of formaldehyde in food

将超声提取、过滤和流动注射装置耦合,由自行设计的集成电路和软件控制,研制了一种全自动食品甲醛分析仪,实现了样品中甲醛提取—过滤—检测的连续自动化。利用在强碱性条件下,甲醛与间苯三酚快速发生显色反应,建立了测定食品中甲醛含量的测定方法,方法线性范围为0.5～20.0μg/mL,检出限为0.04μg/mL。用该法对水发海参、水发鸡爪、鹅肠和牛百叶样品进行了测定,测定结果在0.28～0.76μg/g之间(u=2,95%置信水平),样品加标回收率为88.7%～104%。该法适用于现场样品的快速测定。

An automatic analysis instrument for detection of formaldehyde in food,controlled by self-designed integrated circuits and software,was developed in conjunction of devices of ultrasonic extraction,filtration and flow injection.The extraction-filtration-detection of formaldehyde in samples can be sequentially automatically executed by this instrument.A method was established for determination of formaldehyde in food with presented instrument based on the rapid reaction of formaldehyde and phloroglucinol in s...