塑料科技2025，Vol.53Issue(2)：131-135,5.DOI:10.15925/j.cnki.issn1005-3360.2025.02.024
增益染色吸光法检测水中低浓度微纳塑料
Detection of Low Concentration of Micro-nano Plastics in Water by Gain-stained Absorbance Method
摘要
Abstract
A new spectroscopic method for the determination of microplastics based on the principle of dye-gain absorption has the advantages of simplicity,rapidity,high sensitivity and selective detection of micro-nano fragments.Different particle sizes and types of plastics were used as test materials,and the results showed good gain absorbance.The applicability of the method showed that for the microplastic particles and fiber mixtures with the particles larger than 1 μm,the concentration could be determined by staining,centrifugation,and then taking a quantitative solution on a hemocyte counting plate by microfluorescence counting.For the nanoplastics with the particles lower than 1 μm,the spectrophotometric method can be employed for measurement by utilizing the linear relationship between the concentration of the suspended phase after staining and its absorbance.The method was applied to actual water samples from a wastewater treatment plant,and the results showed that the spiked recoveries of the actual samples ranged from 99.00%to 107.00%,and the detection limit of the method was up to 1.53 mg/L.The present study will provide a convenient method for the quantitative detection of micro-nano plastics in the environment,which has good applicability and wide application prospects.关键词
微塑料/检测方法/染色/分散红3BKey words
Microplastics/Detection method/Staining/Disperse red 3B分类
化学化工引用本文复制引用
雷莹莹,王昭然,陈寒玉..增益染色吸光法检测水中低浓度微纳塑料[J].塑料科技,2025,53(2):131-135,5.基金项目
河南省科技厅联合基金项目(232103810070) （232103810070）
