基于计算机色度学小麦粉中硼砂的快速检测方法研究

Rapid detection of borax in wheat flour based on computer colorimetry

根据硼砂在酸性条件下转化为硼酸,硼酸与姜黄素显色的原理,利用自主设计的图像采集传感器,采集硼砂与显色液显色后的图像,用Lab VIEW设计图像处理软件,建立了基于计算机色度学小麦粉中硼砂的快速筛查方法。优化了显色体系的显色条件和软件的操作功能。结果表明:显色体系的亮度I值与硼酸在0~4 mg/L范围内呈线性关系,并得到测定的硼砂含量与I值的关系曲线。将关系曲线公式植入数据分析系统,通过采集显色后溶液的图像,软件可自动得出硼砂的实际添加量。该法用于实际样品分析,加标回收率为96.6%~102.9%,相对标准偏差(RSD)为1.18%~3.14%。

According to the principle that borax is converted to boric acid under acid condition,and boric acid has color reaction with curcumin,the image of the color reaction between borax and color liquid was collected by self-designed image acquisition sensors,the rapid method to screen borax in wheat flour based on computer and colorimetry was set up by LabVIEW design image processing software.The chro-mogenic condition of the chromogenic system and the operation function of the software were optimized. The results showed that the brightness I value of the color system was linear with boric acid in the range 0~4 mg/L.The borax content and I value curve was determined.The relation curve formula was planted into data analysis system,after collecting the images,the actual level of borax was automatically acquired by the software.The method used for the actual sample analysis,and the recovery of standard addition was 96.6%~96.6%,RSD was 1.18%~3.14%.