Navigation Links
Water quality in orbit
Date:9/13/2009

ck to Earth. Porter says required biocide levels in drinking water are 0.1 to 1 part per million silver and 0.1 to 5 parts per million iodine.

How It Works

To test whether drinking water is adequately disinfected, space station astronauts will collect galley water in sealed plastic bags, and then use syringes to remove some water from the bags and push it through a cartridge that contains a half-inch-diameter, polymer, porous-membrane disk impregnated with a chemical to detect either iodine or silver. The disks, known as "solid phase extraction membranes," capture either iodine or silver, depending on the chemical in the disk.

Next, the bottom half of the cartridge, which contains the disk, is placed against a German company's handheld "diffuse reflectance spectrometer," which shines light on the disk so it can read the disk's color in about two seconds. Porter says the device was developed to measure the reflectivity or gloss, and thus the quality, of finishes such as automotive paint, industrial surfaces, stainless steel and decorative metals.

Each handheld device two are in the kit taken to the space station weighs 1.1 pounds, runs on four AA batteries, has a readout screen and measures 7 inches by 3.7 inches by 3.2 inches.

To test for iodine, the disk is impregnated with PVP (polyvinylpyrrolidone), a nontoxic chemical in contact lens cleaning solutions. The PVP reacts with iodine, and the intensity of the resulting yellow color reveals the concentration of iodine in the water.

To test for silver in water, the disk is imbued with DMABR, which is short for 5-(dimethylaminobenzylidene)rhodanine. A yellowish color indicates silver is absent, while flesh to brighter pink reveals how much silver is present.

"We can do this whole analysis in about two minutes on the ground or in space," Porter says.


'/>"/>

Contact: Lee Siegel
leesiegel@ucomm.utahedu
801-581-8993
University of Utah
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Freshwater supplies threatened in central Pacific
2. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
3. Innovative civil engineering application promises cleaner waters
4. Safe water: simpler method for analyzing radium in water samples cuts testing time
5. Researchers find new taste in fruit flies: carbonated water
6. Low oxygen in coastal waters impairs fish reproduction
7. Extra gene copies were enough to make early humans mouths water
8. Acid rain has a disproportionate impact on coastal waters
9. HARDY rice: less water, more food
10. New microsensor measures volatile organic compounds in water and air on-site
11. Alternative methods proposed to detect pesticides and antibiotics in water and natural food
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Water quality in orbit
(Date:7/21/2015)... , July 21, 2015 Passwords have ... seen in the recent U.S. Office of Personnel ... to the infosec conundrum, but developers and end-users ... To address this dilemma, Biometrics-as-a-Service provider HYPR Corp. ... Tokenization SDK for third party integration. ...
(Date:7/13/2015)... , July 13, 2015 Synaptics Inc. ... human interface solutions, today announced sampling of ClearPad ... display driver integration (TDDI) product targeting smartphones and ... to combine Synaptics , best-in-class touch controller ... driver technology developed in the company,s Japan Design ...
(Date:7/9/2015)... 9, 2015  Synaptics Inc. (NASDAQ: SYNA ), a ... it will report financial results for the fourth quarter ... after the close of market. The company will host ... 2:00 p.m. PT (5:00 p.m. ET), during which management ... on the live call, analysts and investors should dial ...
Breaking Biology News(10 mins):HYPR Corp. Launches Industry First Biometric Tokenization Platform 2HYPR Corp. Launches Industry First Biometric Tokenization Platform 3HYPR Corp. Launches Industry First Biometric Tokenization Platform 4Synaptics Announces Sampling of Second Generation TDDI Solutions 2Synaptics Announces Sampling of Second Generation TDDI Solutions 3Synaptics to Report Fourth Quarter, Fiscal Year 2015 Results on July 30 2
... The changes to the publication requirements of new ... XVIII International Botanical Congress in Melbourne in July 2011 ... To address practical questions arising from the Congress decisions, the ... a series of seven exemplar papers, one each day for ...
... the Greek word for "glue," hold the brain,s neurons together ... but scientists have long puzzled over their prominence in the ... Tel Aviv University researchers say that glia cells are central ... and stores information. According to Ph.D. student Maurizio ...
... the Gobi desert are usually long and very cold ... of livestock died in Mongolia and the re-introduced wild ... Walzer from the University of Veterinary Medicine, Vienna have ... GPS telemetry to provide insights into the effect of ...
Cached Biology News:Brave new world 2Brave new world 3Brain's connective cells are much more than glue 2Brain's connective cells are much more than glue 3Don't put all your eggs in 1 basket -- or all your horses on 1 pasture 2Don't put all your eggs in 1 basket -- or all your horses on 1 pasture 3
(Date:7/31/2015)... ... July 31, 2015 , ... R-Biopharm is ... of partially hydrolyzed gluten in foods, has been accepted by AOAC International as ... Hydrolyzed Gluten in Fermented Cereal-Based Products by R5 Competitive ELISA,” based on a ...
(Date:7/30/2015)... Mass. , July 30, 2015   ... solutions for the interpretation and analysis of genomic ... Matthew Fischer has joined the company as ... Photo - http://photos.prnewswire.com/prnh/20150730/250931 ... capabilities to integrate, interpret, analyze and explore complex ...
(Date:7/30/2015)... -- According to a new market research ... PKPD, Trial Design, Toxicity Prediction, In-house, Contract Service), by ... End Users - Global Forecast to 2020", published by ... 2,107.99 million by 2020 from USD 1,034.93 million in ... Browse more than 75 market ...
(Date:7/30/2015)... DIEGO, July 30, 2015   Senomyx , Inc. ... taste science technologies to discover, develop, and commercialize novel ... industries, today reported financial results for the second quarter ... of 2015, we remain on track to achieve our ... Chief Executive Officer of the Company. "Since our last ...
Breaking Biology Technology:RIDASCREEN® Competitve Gliadin Receives AOAC Official First Action Status 2GenoSpace Introduces Matthew Fischer as Vice President of Sales and Marketing 2Biosimulation Market Worth 2,107.99 Million USD by 2020 2Biosimulation Market Worth 2,107.99 Million USD by 2020 3Biosimulation Market Worth 2,107.99 Million USD by 2020 4SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 2SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 3SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 4SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 5SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 6SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 7SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 8SENOMYX ANNOUNCES SECOND QUARTER 2015 FINANCIAL RESULTS 9
... 13 ADVENTRX Pharmaceuticals,Inc. (Amex: ANX ... on commercializing proprietary product candidates for the ... that Evan M. Levine,ADVENTRX,s chief executive officer, ... Fifth Annual Growth Conference on Wednesday,September 19th, ...
... ... to inhibit ... 13, 9:45 a.m. EDT at ... http://www.isispharm.com , CARLSBAD, Calif., Sept. 13 Isis,Pharmaceuticals, Inc. (Nasdaq: ISIS ...
... VANCOUVER, Sept. 13 /PRNewswire-FirstCall/ - Angiotech Pharmaceuticals,Inc. ... today that it received a,favourable decision from ... an attempt by Johnson & Johnson,s subsidiary, ... Zealand Patent 523799, which,pertains to compositions comprising ...
Cached Biology Technology:ADVENTRX Pharmaceuticals to Present at the ThinkEquity Partners' Fifth Annual Growth Conference 2Isis Enters Broad Collaboration With Ortho-McNeil, Inc. for the Discovery, Development and Commercialization of Antisense Drugs to Treat Metabolic Diseases 2Isis Enters Broad Collaboration With Ortho-McNeil, Inc. for the Discovery, Development and Commercialization of Antisense Drugs to Treat Metabolic Diseases 3Isis Enters Broad Collaboration With Ortho-McNeil, Inc. for the Discovery, Development and Commercialization of Antisense Drugs to Treat Metabolic Diseases 4Isis Enters Broad Collaboration With Ortho-McNeil, Inc. for the Discovery, Development and Commercialization of Antisense Drugs to Treat Metabolic Diseases 5Angiotech receives favourable patent decision from New Zealand's Intellectual Property Office 2Angiotech receives favourable patent decision from New Zealand's Intellectual Property Office 3Angiotech receives favourable patent decision from New Zealand's Intellectual Property Office 4
Rabbit polyclonal to Glutathione S Transferase alpha ( Abpromise for all tested applications). Antigen: Full length protein: Human Glutathione S Transferase alpha. Entrez GeneID: 2938 Swi...
Affinity Purified Rabbit Anti-mouse sRANKL Biotinylated Polyclonal Antibody...
Mouse anti-IkBa/MAD-3 Class: Antibody Product Group: Signalling molecules and phospho-specific Antibody...
Mouse monoclonal [002-49] to C1s ( Abpromise for all tested applications). entrezGeneID: 716 SwissProtID: P09871...
Biology Products: