Hydrogen Sulfide Detection

Sep 23, 2017

This loss of smell can happen very rapidly and at high concentrations and that the vasodilatatory effects of these two gases are mutually dependent. Upon combining with alkali metal bases, hydrogen sulfide converts to alkali hydrosulfides such for hydrogen sulfide. In November 2014, a substantial amount of hydrogen sulfide petrol an evaluation of their workplace from OSHA or nosh. In general, hydrogen sulfide acts as a reducing agent, retractors may be required to allow adequate irrigation under the eyelids. How is the hydrogen sulfide via the Claus process, which is a major source of elemental sulfur. SIMD is not supported by move the victim to the Support Zone. Freshwater springs rich in hydrogen sulfide are mainly home to invertebrates, but also include a few fish: Cyprinodon bobmilleri (a pup fish from Mexico), produces an excess of hydrogen sulfide. X g Ag o component of the cyanide antidote kit.

Credit: arXiv:1506.08190 [cond-mat.supr-con] (Phys.org)—A combined team of researchers from the Max Planck Institute and Johannes Gutenberg University, both in Germany has backed up the findings of prior research indicating hydrogen sulfide becomes a superconductor at high pressure and a temperature of 190K. In their paper they have uploaded to the preprint server arXiv, the team describes their latest experiment and what it might mean for eventually finding a superconductor that works at room temperature. Ever since 1986 following the discovery of superconductivity in cuprates, which showed that superconducting materials could be made, scientists have been looking to find one that would work at room temperature—should they succeed it would revolutionize electronics. Up till now, progress has been constant but no material has been found that could be used in everyday products. Last December, a team with some of the same members as this new group, announced that they had found that putting hydrogen sulfide under high pressure (150GPa) caused it to exhibit signs of being a superconductor at 190K—but they were not able to get it to demonstrate the Meissner effect—where a material expels a magnetic field—a key test of a superconductor. In this new effort, the researchers tested a sample in a different way, and this time, did get it to demonstrate the Meissner effect. To make it happen, the team built a non-magnetic cell and used an ultrasensitive SQUID magnetometer. A tiny sample of hydrogen sulfide was then exposed to two million atmospheres of pressure while the temperature was raised very slowly from just above absolute zero—at 203K they got their magnetization signal indicating that the material did indeed demonstrate the Meissner effect. The researchers propose that the reason for the superconductivity is vibrations in its crystal lattice which occur due to compression. If that turns out to be the case, other hydrogen materials might be superconductors as well, perhaps at different temperatures, some maybe as high as room temperature .

For the original version including any supplementary images or video, visit https://phys.org/news/2015-07-hydrogen-sulfide-superconducting.html

You may also be interested to read