Nmij crm 7202 c

All reagents and samples were used without further purification. Methanol (MeOH) and hydrochloric acid (HCl) were obtained from Kanto Chemical Co., Inc. 2-Morpholinoethanesulfonic acid (MES) was purchased from Dojindo Laboratories Co., Ltd. Reagents purchased from Sigma-Aldrich Co. LLC. were zinc (Zn²⁺) perchlorate, copper (Cu²⁺) perchlorate, nickel (Ni²⁺) perchlorate, cobalt (Co²⁺) perchlorate, lead (Pb²⁺) perchlorate, and mercury (Hg²⁺) perchlorate. Sodium hydroxide (NaOH), a commercially available river sample with trace elements in river water (Elevated Level, NMIJ CRM 7202-c), and Daigo's artificial seawater SP for marine microalgae medium were obtained from FUJIFILM Wako Pure Chemical Industries, Ltd. The synthetic methodology for 1_poly was established in our previous report.^{41 (link)}

All reagents used for device fabrication and sensing were utilized without further pre-treatment. ARS, a commercially available river sample with trace elements in river water (Elevated Level, NMIJ CRM 7202-c, Supplementary Table S1), and iron(III) nitrate enneahydrate (Fe³⁺) were obtained from FUJIFILM Wako Pure Chemical Co., Ltd. The target metal ions including cobalt(II) perchlorate hexahydrate (Co²⁺), calcium perchlorate tetrahydrate (Ca²⁺), lead(II) perchlorate trihydrate (Pb²⁺), cadmium perchlorate hydrate (Cd²⁺), nickel(II) perchlorate hexahydrate (Ni²⁺), copper(II) perchlorate hexahydrate (Cu²⁺), magnesium perchlorate hexahydrate (Mg²⁺), aluminum perchlorate non-ahydrate (Al³⁺), mercury(II) perchlorate hydrate (Hg²⁺), and zinc perchlorate hexahydrate (Zn²⁺) were purchased from Sigma-Aldrich. The building blocks of the chemosensors purchased from Tokyo Chemical Industry Co., Ltd. were 3-NPBA, BPR, PR, and PV. A buffer material purchased from DOJINDO was 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES). All aqueous solutions were prepared using Milli-Q water (18.2 Ω cm).