Colorimetric analysis based on solid-phase extraction with sedimentable dispersed particulates: demonstration of concept and application for on-site environmental water analysis. - Kohama, Nozomi; Matsuhira, Koki; Okazaki, Takuya; Sazawa, Kazuto; Hata, Noriko; Kuramitz, Hideki; Taguchi, Shigeru (Analytical & Bioanalytical Chemistry, 2022)