Abstract:
A method for determining the amount of residual disinfectant removing agent in a process stream to which the disinfectant removing agent has been added to completely remove a disinfectant residual, comprising the steps of: (a) drawing off a sample of the process stream; (b) mixing an acidic iodate solution and an iodide solution to produce an iodine analyzing agent; (c) adding to the sample the iodine analyzing agent in an amount sufficient to react with the residual disinfectant removing agent and leave an unreacted amount of residual iodine; (d) allowing sufficient time for the iodine to react with the residual disinfectant removing agent; (e) analyzing the sample to determine the amount of residual iodine remaining in the sample; and (f) determining the amount of residual disinfectant removing agent in the sample based on the amount of iodine analyzing agent added and the amount of residual iodine remaining in the sample after reaction.
Abstract:
Die Erfindung betrifft einen optischen Quecksilberdetektor (32) mit (a) einer Lichtquelle (22), insbesondere einem Laser, zum Aussenden von Licht, (b) einer Wellenleitstruktur (12), die mit der Lichtquelle (22) verbunden ist, und (c) einem Detektorelement (26), das in einem Lichtpfad (P) hinter der Wellenleitstruktur (12) angeordnet ist und ausgebildet ist zum Erfassen einer Eigenschaft des Lichts, (d) wobei die Wellenleitstruktur (12) eine Beschichtung (20) aus einem Beschichtungsmaterial besitzt, das mit Quecksilber zu einem Reaktionsprodukt reagiert, (e) wobei die Wellenleitstruktur (12) so ausgebildet ist, dass das in der Wellenleitstruktur (12) geleitete Licht sich in der Eigenschaft verändert, wenn das Beschichtungsmaterial zum Reaktionsprodukt reagiert, sodass die vom Detektorelement (26) erfasste Eigenschaft des Lichts von der Menge des Reaktionsprodukts abhängt, und (f) wobei der Quecksilberdetektor (32) eine Heizvorrichtung (38) aufweist, mittels der die Beschichtung (20) auf eine Regenerationstemperatur erwärmbar ist, ab der das Reaktionsprodukt zum Beschichtungsmaterial reagiert.
Abstract:
A sensing system for detecting hydrogen in an insulation fluid (8) of an electrical device (10) is provided. The system comprises: a sensing element (15) which comprises an optically transparent substrate (20); a sensing layer (25) coated on the substrate, comprising a metal-comprising thin film which changes its transparency due to hydrogenation when exposed to a defined hydrogen concentration; a catalytic layer (30) adjacent to the sensing layer; and a permanent visual indicator (40) located adjacent to the substrate (20), such that the substrate is positioned in a line of sight between the permanent visual indicator (40) and an observer of the sensing system (1), such that the permanent visual indicator (40) becomes visible to an observer at a defined hydrogen concentration.
Abstract:
Methods and apparatus for the collection, transportation, and analysis of gas samples which may be required in various scientific, environmental, and natural resource contexts is provided. An isolating container for removing a component from a fluid sample includes a body defining a sampling chamber having a first end and a second end; a first valve assembly coupled to the first end; a reactant material positioned within the sampling chamber for reacting with the component; and a second valve assembly coupled to the second end, wherein the fluid sample enters the sampling chamber through the first valve assembly and exits through the second valve assembly.
Abstract:
A test element (10) used to determine concentration levels of free and total chlorine in a water sample comprises a test pad (12) adhered to a substrate (14), wherein the test pad (12) is impregnated with a stabilized DPD solution. The test pad (12) is color responsive to different concentration levels of chlorine in the water and compared to a color chart to determine the level of free chlorine and/or total chlorine in the water. The stabilized DPD solution may include N,N-diethyl-p-phenylenediamine oxalate salt, a polymeric anhydride such as a methyl-vinyl anhydride and an organo-sulfate such as dimethylsulfone.
Abstract:
La invención versa sobre el uso de un compuesto cromogénico, denominado compuesto (1), para la detección del anión cianuro (CN ) tanto en estado gaseoso, a partir del compuesto HCN, como en disolución, preferentemente en disolución acuosa. La presente invención describe además los métodos para la detección de dicha molécula en ambos estados, mediante el uso del compuesto (1), así como los dispositivos, para llevar a cabo dichos métodos, que comprenden el compuesto cromogénico 1.
Abstract:
A device, method, and test kit for rapidly detecting cyanide in a sample. The inventive device comprises a container comprising a sample chamber and a sensor chamber separated by a selectively permeable barrier. The sample chamber contains a reagent for releasing cyanide from the sample, and the sensor chamber contains a cyanide detector comprising a conductive polymer which absorbs the released cyanide, generating a change in signal. Signals can be viewed colorimetrically or transmitted to a LCD/LED panel wherein the cyanide measurement readout is displayed.
Abstract:
Détecteur multifonctionnel de composés gazeux ou mélanges de composés gazeux choisis parmi NH 2 Cl, NHCl 2 , NCl 3 , chlore total, NOx où x=1 ou 2, O 3 et X 2 où X=Cl, Br ou I dans un échantillon, ledit détecteur comprenantun premier capteur comprenant un iodure et un composé réactif choisi parmi l'amidon, l'amylose, l'amylopectine, le xyloglucane, le xylane, le chitosane, le glycogène, l'alcool polyvinylique ou un composé de l'alcool polyvinylique, la cellulose ou un composé de la cellulose, l'α-cyclodextrine, la théobromine et les polymères blocs d'oxydes de polypropylène et de polyéthylène, incorporés dans un bloc de matériau sol-gel absorbant dans l'UV mais pas dans le visible, et ses applications.
Abstract:
L'invention concerne un procédé de prélèvement d'un produit solide soufré comprenant: - la fourniture d'un flux gazeux comprenant du sulfure d'hydrogène; la mise en contact du flux gazeux avec un réactif solide et la réaction du réactif solide avec le sulfure d'hydrogène contenu dans le flux gazeux, ladite réaction fixant le soufre du sulfure d'hydrogène en formant un produit solide soufré de couleur différente du réactif solide; et la récupération du produit solide soufré. L'invention concerne également un dispositif approprié à la mise en œuvre de ce procédé.