Purnendu K. Dasgupta

TL;DR: In this paper, the preservation of sulfite, sulfide, and methanethiol in buffered formaldehyde and oxaldihydroxamic acid stabilizers has been studied, and flow injection analysis procedures that involve T mixing or membrane-based reagent introduction have been developed for the fast (24 samples/h) analysis of these anions based upon the reaction with N-acridinylmaleimide in a water-N,Ndimethylformamide medium to form a fluorescent product.

TL;DR: A capacitance to digital converter (AD7746) is used in the same mode as noncontact conductance detectors and provides a very affordable nothing-else-required means of contactless surrogate conductivity detection from capillary scale to larger bore conduits.

TL;DR: Using circuitry based on newly available switched integrator integrated circuit (IC) packages, it is possible to construct inexpensive absorbance detectors with p-p noise levels as low as 3 microAU under actual use conditions.

TL;DR: The concentrations of HONO in indoor atmospheres are clearly correlated with open flame sources (e.g., hydrocarbon fuel fired heaters, stoves, etc.). Relatively high levels, 20-90 ppbv, were encountered in a number of sampling sites as discussed by the authors.

TL;DR: In this paper, a novel approach to simultaneously practicing both suppressed and nonsuppressed ion chromatography (IC) is proposed, where a constant concentration of NaOH is introduced by an in-line microelectrodialytic NaOH generator, and this is followed by a second conductivity detector.