![Gas-diffusion flow injection determination of Hg(II) with chemiluminescence detection [An article from: Analytica Chimica Acta]](https://www.ebooknetworking.net/books/B00/0PC/bigB000PC6KPC.jpg)
Gas-diffusion flow injection determination of Hg(II) with chemiluminescence detection [An article from: Analytica Chimica Acta]
Book Details
Author(s)N. Amini, S.D. Kolev
PublisherElsevier
ISBN / ASINB000PC6KPC
ISBN-13978B000PC6KP4
MarketplaceCanada 🇨🇦
Description
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
A gas-diffusion flow injection method for the chemiluminescence detection of Hg(II) based on the luminol-H"2O"2 reaction was developed. The analytical procedure involved the injection of Hg(II) samples and standards into a 1.50M H"2SO"4 carrier stream, which was subsequently merged with a reagent stream of 0.60% (w/v) SnCl"2 in 1.50M H"2SO"4 to reduce Hg(II) to metallic Hg. The gas-diffusion cell was thermostated at 85^oC to enhance the vaporisation of metallic Hg. Mercury vapour, transported across the Teflon membrane of the gas-diffusion cell into the acceptor stream containing 1.00x10^-^4M KMnO"4 in 0.30M H"2SO"4, was oxidised back to Hg(II). The acceptor stream was merged with a reagent stream containing 2.50M H"2O"2 in deionised water and then the combined stream was merged with another reagent stream containing 7.50x10^-^3M luminol in 3.00M NaOH at a confluence point opposite to the photomultiplier tube of the detection system. The chemiluminescence intensity of the luminol-H"2O"2 reaction was enhanced by the presence of Hg(II) in the acceptor stream. The corresponding increase was related to the original concentration of Hg(II) in the samples and standards. Under optimal conditions, the chemiluminescence gas-diffusion flow injection method was characterised by a linear calibration range between 1@mgL^-^1 and 100@mgL^-^1, a detection limit of 0.8@mgL^-^1 and a sampling rate of 12 samples per hour. It was successfully applied to the determination of mercury in seawater and river samples.
Description:
A gas-diffusion flow injection method for the chemiluminescence detection of Hg(II) based on the luminol-H"2O"2 reaction was developed. The analytical procedure involved the injection of Hg(II) samples and standards into a 1.50M H"2SO"4 carrier stream, which was subsequently merged with a reagent stream of 0.60% (w/v) SnCl"2 in 1.50M H"2SO"4 to reduce Hg(II) to metallic Hg. The gas-diffusion cell was thermostated at 85^oC to enhance the vaporisation of metallic Hg. Mercury vapour, transported across the Teflon membrane of the gas-diffusion cell into the acceptor stream containing 1.00x10^-^4M KMnO"4 in 0.30M H"2SO"4, was oxidised back to Hg(II). The acceptor stream was merged with a reagent stream containing 2.50M H"2O"2 in deionised water and then the combined stream was merged with another reagent stream containing 7.50x10^-^3M luminol in 3.00M NaOH at a confluence point opposite to the photomultiplier tube of the detection system. The chemiluminescence intensity of the luminol-H"2O"2 reaction was enhanced by the presence of Hg(II) in the acceptor stream. The corresponding increase was related to the original concentration of Hg(II) in the samples and standards. Under optimal conditions, the chemiluminescence gas-diffusion flow injection method was characterised by a linear calibration range between 1@mgL^-^1 and 100@mgL^-^1, a detection limit of 0.8@mgL^-^1 and a sampling rate of 12 samples per hour. It was successfully applied to the determination of mercury in seawater and river samples.
