In situ measurement of dissolved Fe(ii) in sediment pore water with a novel sensor based on C18-ferrozine concentration and optical imaging detection

Abstract

A novel sensor system, which integrated sampling, enrichment, and in situ measurement of dissolved Fe(ii) in sediment pore water, was developed.

An In Situ Analyzer for Two-Dimensional Fe(II) Distribution in Sediment Pore Water Based on Ferrozine Coloration and Computer Imaging Densitometry

“…However, this range is already suitable for most of the marine sediments and normal lake sediments. The binding capacity of the concentrating gel is briefly discussed in our previous study …”

“…Ferrozine exhibits good selectivity toward Fe­(II), forming a stable magenta-colored complex. C18 was selected because it could tightly absorb ferrozine and could be well mixed in polyacrylamide gel …”

“…The formulas of the two gels are based on our previous study . Briefly, a polyacrylamide gel solution was made of acrylamide, N , N ′-methylene diacrylamide, and pure water.…”

“…C18 was selected because it could tightly absorb ferrozine and could be well mixed in polyacrylamide gel. 35 The formulas of the two gels are based on our previous study. 35 Briefly, a polyacrylamide gel solution was made of acrylamide, N,N′-methylene diacrylamide, and pure water.…”

“…In our previous study, 35 a sensor system, which included a C18-ferrozine-based concentrating gel and an optical imaging device fitted with an LED light source and camera, is developed for in situ measurement of dissolved Fe(II) in sediment pore water. However, the device is rather preliminary, relatively cumbersome, and can only detect Fe(II) at one point (25 mm in diameter).…”