Multi-reverse flow injection analysis integrated with multi-optical sensor for simultaneous determination of Mn(II), Fe(II), Cu(II) and Fe(III) in natural waters

摘要: Abstract Multi-reverse flow injection analysis (Mr-FIA) integrated with multi-optical sensor was developed and optimized for the simultaneous determination of multi ions; Mn(II), Fe(II), Cu(II) Fe(III) in water samples. The sample/standard solutions were propelled making use a four channels peristaltic pump whereas 4 colorimetric reagents specific metal ions separately injected sample streams using multi-syringe pump. color zones that formed individual mixing coils then streamed into multi-channels spectrometer, which comprised flows through cell pairs light emitting diode photodiode, whereby signals measured concurrently. linearity range (along detection limit, µg L−1) 0.050–3.0(16), 0.30–2.0 (11), 0.050–1.0(12) 0.10–1.0(50) mg L−1, Fe(III), respectively. In interim, correlation coefficients 0.9924–0.9942. percentages relative standard deviation less than 3. proposed system applied successfully to determine targeted simultaneously natural high throughput low reagent consumption, thus it satisfies criteria Green Analytical Chemistry (GAC) its goals.