Determination of Harmful Elements in Cervi Cornus Colla Based on Microwave Digestion and ICP-AES Technology

Abstract:

Objective: To establish a method for determining the content of Pb,Cd,As,Hg,Cu and Cr in Cervi Cornus Colla. Method: Microwave digestion and inductively coupled plasma-atomic wmission spectrometry (ICP-AES) were adopted to determine the content of Pb,Cd,As,Hg,Cu and Cr in 11 batches of Cervi Cornus Colla.Microwave digestion conditions were as followings:0-3 min,1 600 W,110℃;3-6 min,1 600 W,150℃;6-16 min,1 600 W,185℃.Determination conditions of ICP-AES were:incident power of 1.4 kW,argon as cooling gas with flow rate of 12 L·min^-1,flow rate of carrier gas and auxiliary with 1,0.8 L·min^-1,volume of sample enhance 1 mL·min^-1. Result: Detection limit of Pb,Cd,As,Hg,Cu and Cr were 0.15,0.01,0.27,0.08,0.03,0.03 mg·kg^-1,respectively.recoveries was between 90%-112%,precision and repeatability were in line with detection requirments.Cd,As and Hg were not detected in each sample,apart from sample from F was not detected Pb,Pb,Cu and Cr were detected in other samples,the content of Cr was high in some samples. Conclusion: This method was accurate,fast and suitable for determination of harmful elements in glue herbs.