Joseph Louis Gay-Lussac (1778–1850) and analytical chemistry

Szabadváry, F.

doi:10.1016/0039-9140(78)80162-3

Cited by 3 publications

(4 citation statements)

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“…Paper has a long history in chemical analysis starting with litmus paper. While commonplace now, litmus paper was a revelation at the time that enabled measurements of pH in a way not possible . Development of analytical devices continued slowly with the next notable developments coming from West who used paper as a substrate material for metals analysis .…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

“…While commonplace now, litmus paper was a revelation at the time that enabled measurements of pH in a way not possible. 505 Development of analytical devices continued slowly with the next notable developments coming from West who used paper as a substrate material for metals analysis. 506 Work in the field continued slowly with the most notable development being the lateral flow immunoassay that was first commercialized as an over the counter home pregnancy test.…”

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

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Microfluidic Paper-Based Analytical Devices: From Design to Applications

et al. 2021

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Microfluidic paper-based analytical devices (μPADs) have garnered significant interest as a promising analytical platform in the past decade. Compared with traditional microfluidics, μPADs present unique advantages, such as easy fabrication using established patterning methods, economical cost, ability to drive and manipulate flow without equipment, and capability of storing reagents for various applications. This Review aims to provide a comprehensive review of the field, highlighting fabrication methods available to date with their respective advantages and drawbacks, device designs and modifications to accommodate different assay needs, detection strategies, and the growing applications of μPADs. Finally, we discuss how the field needs to continue moving forward to realize its full potential.

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Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

Section: Conclusion and Future Perspectivesmentioning

confidence: 99%

Microfluidic Paper-Based Analytical Devices: From Design to Applications

et al. 2021

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“…Iodometry, the titrimetric determination of iodine, is steeped in chemical history , and is the basis of many important analytical methods . It was first described by Bunsen in 1853, following the introduction of quantitative titrimetric methods by Gay-Lussac around 1824 (coincidently, Gay-Lussac named the element iodine, from which iodometry gets its name). Refinements to the method were described by Schwartz and Houtou de Labillardière, who introduced the use of sodium thiosulfate as titrant (in place of sulfurous acid) and the starch–iodine complex as indicator, respectively. , …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Iodometric Analysis of the Polyiodide Salt (NMe₄)[I₅]

Young

Volaric

2020

J. Chem. Educ.

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This paper describes a first-year undergraduate exercise involving the synthesis of an “unknown” polyiodide salt, (NMe4)[I5], and the determination of its formula using the classic iodine–thiosulfate (iodometric) titration. The exercise introduces students to simple synthetic and titrimetric techniques, assists the development of their chemical and glassware handling and titrimetric skills, and acquaints them with unfamiliar polyiodide compounds. It also introduces students to key chemical concepts such as The Law of Definite Proportions, percentage elemental composition, empirical chemical formulas, quantitative stoichiometric reactions, and halogen catenation.

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“…The history of nucleation is a few centuries old, and starts with the first experiments of Fahrenheit on crystallisation of water in 1714 [14] -just like the above example -and with analogous experiments on different liquids performed by Gay Lussac [15]. In 1878, Josiah Willard Gibbs made a fundamental contribution to the understanding we still have today of the nucleation process [16].…”

Section: Nucleationmentioning

confidence: 99%

A rare event

Coli¹

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When one presents a scientific work that refers to some branch of physics, both at a popular and technical level, usually even non-expert readers have at least a vague idea of what they are dealing with. This happens with a very large set of topics, ranging from gravity to semiconductors. On the contrary, when presenting a thesis on colloids, it is strictly necessary to start this long journey from the mere definition of the system under investigation. This is by the way a rather peculiar phenomenon, as each of us has to deal with colloids in everyday life. So, what are colloids?One possibility is to call a colloid any particle whose size varies between about 1 nm and 1 µm [1]. This term comes from the Greek word κoλλα, which means glue, as it was coined to describe sticky particles on a semipermeable membrane in 1860, by Thomas Graham [2]. Other more familiar examples of colloids include the toothpaste, paints, milk, and various creams.All of the above-mentioned examples involve not only colloids, but more precisely insoluble colloids dispersed in a medium composed of particles that are much smaller than the colloids themselves. This is the most interesting kind of colloidal system (as well as the one on which this thesis focuses), because it gives rise to the other fundamental characteristic of colloids, which also serves as an alternative definition for them. What distinguishes colloids from other systems in fact, more than their spatial dimensions, is their dynamics. Colloids perform trajectories which are random, but still possess very precise characteristics. This dynamics is called Brownian motion, as a tribute to Robert Brown, the botanist who first described the movement of grains of pollen in water in 1827 [3]. At the dawn of the twentieth century, Einstein and Sutherland [4,5] gave an explanation to the random movement of colloidal particles suspended in a medium. They understood that the numerous molecules of the solvent are in constant motion due to their thermal energy, and collide continuously onto the surfaces of the colloids. The result of these interactions is a stochastic force that acts on the colloids themselves. Returning to the first attempt to give a definition of a colloid, based on spatial dimensions, we realise that both lower and upper limits (respectively 1 nm and 1 µm) are imposed by the dynamical characteristics just described. In other words, colloids are particles that are large enough not to be affected by quantum effects, but small enough to experience Brownian motion.In a colloidal system, colloids interact not only with the solvent particles, but also with each other. The resulting collective behaviour is surprisingly rich and diverse. Indeed, thanks to the Brownian motion, a colloidal system effectively explores phase space in search of the minimum free energy. This exploration brings different systems into a multitude of different phasesranging from the fluid phase to crystalline states, to liquid crystals and even to quasicrystalsthrough the process of self-assembly [6]. Th...

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Joseph Louis Gay-Lussac (1778–1850) and analytical chemistry

Cited by 3 publications

References 0 publications

Microfluidic Paper-Based Analytical Devices: From Design to Applications

Microfluidic Paper-Based Analytical Devices: From Design to Applications

Synthesis and Iodometric Analysis of the Polyiodide Salt (NMe₄)[I₅]

A rare event

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Joseph Louis Gay-Lussac (1778–1850) and analytical chemistry

Cited by 3 publications

References 0 publications

Microfluidic Paper-Based Analytical Devices: From Design to Applications

Microfluidic Paper-Based Analytical Devices: From Design to Applications

Synthesis and Iodometric Analysis of the Polyiodide Salt (NMe4)[I5]

A rare event

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Synthesis and Iodometric Analysis of the Polyiodide Salt (NMe₄)[I₅]