Feasibility of digital image colorimetric methods for iron determination in river sediment  

作　　者：Patricia Fernanda Ferreira Lovato Eduardo Sidinei Chaves Luciano Nassif Vidal Poliana Macedo Santos 

机构地区：[1]Universidade Tecnologica Federal do Paraná,81280-340 Curitiba,PR,Brazil [2]Universidade Federal de Santa Catarina,88040-900 Florianopolis,SC,Brazil

出　　处：《International Journal of Sediment Research》2024年第5期714-719,共6页国际泥沙研究（英文版）

基　　金：financial support via grant no 409111/2016-3 the Conselho Nacional de Desenvolvimento Científico e Tecnologico(CNPq),Brazil。

摘　　要：The current study describes the development of simple,low-cost,and high-throughput digital image colorimetric methods to determine the total iron concentration in river sediment using the spot-test reactions of iron with 1,10-phenanthroline and thiocyanate.The colorimetric assay was done on 96-microzone plates,and a flatbed scanner was applied to acquire the images.The proposed methods offered a linear range from 0.2 to 14.0 mg/L,with a detection limit of 0.11 mg/kg for the 1,10-phenanthroline method,and,for the thiocyanate method,the linear range comprises 2.0–10.0 mg/L,with a detection limit of 0.28 mg/kg.It was observed that both proposed digital image colorimetric methods(1,10-phenanthroline and thiocyanate)yielded statistically similar results to the reference procedures at a 95%confidence level.A standard reference material(NIST 8704)also was utilized for accuracy assessment and the results were statistically equivalent to the certified values within the 95%confidence level.The digital image colorimetric methods can be an alternative method for iron determination in sediment samples,allowing fast sample screening at a low cost.

关 键 词：Iron SEDIMENT Digital image RGB color space 1 10-Phenanthroline method Thiocyanate method 

分 类 号：TV14[水利工程—水力学及河流动力学]