[ Snelle detectie onzuiver chloorwater ]

Bijproducten chloreren simpeler te detecteren

22 oktober 2009 Tim Snoek 25 reacties 4643x gelezen

Toxische bijproducten die ontstaan bij het chloreren van water zijn met een nieuwe methode sneller op te sporen. Chemici van de University of Memphis beschrijven de methode in Analytica Chimica Acta.

In veel Westerse landen wordt chloor aan drinkwater toegevoegd om het te ontsmetten. Het chloor reageert met water tot waterstofhypochloriet (HOCl) en zoutzuur (HCl), die op hun beurt micro-organismen omleggen. Maar chloor kan ook met organische stoffen uit het water reageren tot toxische halogeenbevattende stoffen, waaronder negen verschillende halo-acetaten. In Amerika mag de opgetelde concentratie van vijf bepaalde halo-acetaten niet meer zijn dan 0,06 milligram per liter.

 

Er bestaan verschillende methoden op de concentratie van de halo-acetaten in drinkwater te bepalen, die allen zijn gebaseerd op gaschromatografie. Het grote nadeel is dat er veel extractie- en modificatiestappen inzitten, waardoor de methodes veel tijd kosten.

 

De beschreven methode is simpeler. De halo-acetaten worden met ionchromatografie gescheiden, waarna ze met nicotinamide reageren onder vorming van een fluorescerend product. Door het meten van de fluorescentie kun je de concentratie bepalen van de negen individuele halo-acetaten. Het doormeten van een monster kost twee uur, bovendien is de methode volledig geautomatiseerd. De detectielimiet ligt tussen de 0,6 en 10,1 microgram per liter.

 

De onderzoekers testten hun methode uit op drinkwatermonsters. Ook pasten ze een conventionele GC-methode toe. Beide methoden gaven vergelijkbare uitkomsten.

 

Bron: separationsNOW.com



Reacties

Reacties

Dania 04/02/2012 13:00

Just found this blog. excellent article. how long have you been writing? this is good writing. are you a journalist aswell? anyway, thanks again. subscribing to the rss :)

FH Sports1
Auto Insurance Middleburg

zillow 03/02/2012 09:10

Great job on the site, it looks outstanding. I am going to save it and will make sure to check often

arbor lattice
music distribution

Beats by dre 03/02/2012 08:51

Durability and professional in the Beats by dre field of portable audio is very important, portable stereo headset relatively lightweight and easy to be damaged; professional headsets use and moves around, but also easy to cross the line and pull off, requiring headphones made ??very strong, and easy maintenance and replacement parts. Another is Monster Headphones associated with the durability to withstand the power, Beats Sale Online small power you can push the headset is very loud, when there is more than the power to withstand the possibility of damage to the headset, the headset under Beats by Dre Studio the general civil power less than 100mW, 100mW-professional headset 1000mW. The voice coil of high impedance headphones strong resistance, unlike the low-impedance headphones as sensitive to the voice coil to the power Beats Solo HD changes, and more durable.

Beats by dre 03/02/2012 08:50


Durability and professional in the Beats by dre field of portable audio is very important, portable stereo headset relatively lightweight and easy to be damaged; professional headsets use and moves around, but also easy to cross the line and pull off, requiring headphones made ??very strong, and easy maintenance and replacement parts. Another is Monster Headphones associated with the durability to withstand the power, Beats Sale Online small power you can push the headset is very loud, when there is more than the power to withstand the possibility of damage to the headset, the headset under Beats by Dre Studio the general civil power less than 100mW, 100mW-professional headset 1000mW. The voice coil of high impedance headphones strong resistance, unlike the low-impedance headphones as sensitive to the voice coil to the power Beats Solo HD changes, and more durable.

xx 03/02/2012 03:09


The Discount Coach Purses Outlet fairy castles blew on the eyeport gnawing panels on the freezing cold months would probably have explained it any wisdom.Prada outlet is synonymous with luxury, fashion outlet, prada, prada authentic top, elegance and nobility in the fashion world.However Burberry Outlet Stores Online does not have any proper silhouette, but even now quite substantial in the fad. Chanel Online Shop Cruise Collection 2010/11, the color is bright, the aid may not know is refreshing? This one of a range including two wallet has a style is a little familiar? Yes! the concept of Chanel Handbags makeup box design, however on the Shang has favor full of pink and Red ~! If you, too, is that it is conservative, who is black, also has offers Ah ~! as friends can see Chanel Online Shop.

shoes 2011 29/01/2012 11:03

In mordern society, health is the most important topic people would like to talk about. Health Wholesale Jordan Sneakers, material without chemical hazards, health shoes are all sought after by people. With the ideal of human Vibram Five Fingers Shoes For Sale, more and more companies are all committed to producing health Kobe Bryant Basketball Shoes.

Les.A 20/01/2012 04:00

Tha oakley cairn elevates itself at Chris oakley sunglasses upon four red posts, and one can then see the dance and merriment of the cheap oakleys g oakley canada
blins within. casque dr dre Through that peasant's farm there drives every night a glowing coach, drawn by casque dr dree four coal-black casque beats horses. Where we casque beats pas cher now see a pond overgrown with reeds and roots there http://www.discountedoakley-sunglasses.com/

kkay 17/01/2012 08:05

I got to this blog from Facebook (one of my friends posted it). After reading,

flower store dallas

ugg boots cheap 17/01/2012 06:15

Bell & Ross watches replica plays a major role in creating a brand name that fashion lovers want to identify with.
Collections from the design labels such as Breguet watches replica and other beauty are released after every six months.
With every new launch, a new Breitling watches replica technology is developed.
This had led to making Bvlgari watches replica remain competitive in the International market.
The entire Cartier watches replica packaging process is paid into detail to enhance the collections quality and appearance.
This ensures that the Chopard watches replica is properly safeguard from harsh weather conditions so that the buyer gets it when it's as new as it ought to be.
Concord watches replica are usually packaged in cartons and smaller boxes which are beautifully decorated with artwork and carrying the company label.
Other than flaunting Gucci watches replica, the reason behind this is to make the collections customer friendly.
This applies the most when shipping has to be done and the type of Hublot watches replica packaging is used to determine the packaging cost.
High quality packaging of IWC watches replica, watches, earrings and other help protect them from getting dust or moisture from the environment.
When people see a buyer carrying a bag with the Jacob & Co watches replica of the company, they will definitely get attracted and pulled towards with an urge to get the same.
Jaeger leCoultre watches replica also enhances flexibility in transport.
Among the most important cheap designer sunglasses buying tips are - always buy only from a reputed store and read thoroughly through the warranty policy. One of the most important discount replica sunglasses buying tips when it comes to gemstones, is to beware of imitations in plastic and glass. The synthetically manufactured ray ban sunglasses are less expensive than naturally mined stones. When it comes to carrera sunglasses, since natural pearls are rare, most pearls used in jewelry are either cultured or imitation pearls. A baltimore ravens jerseys custom's value is based on its size, and the quality of it's nacre coating, which imparts the sheen. When it comes to improving or maintaining an individual's health, there are various womens baltimore ravens jersey that can be followed to accomplish this objective. Diet and exercise are often a hot topic of ugg boots cheap in the fitness market as individuals try to maintain a healthy image and improve their daily lives. One of the possibilities of ugg argyle knit boots that individuals ought to take is with the benefit of utilizing to protect their eyes from the damaging UV rays and improve the health of their eyes. When considering what these options are, it is best to compare your ugg classic tall metallic boots that are available with this advantage of health. Traditionally most people look to new york jets jerseys like mall outlets or specialized stores so as to meet their need. Whilst this is a choice which allows for individual interaction and the opportunity to try on various, it might not provide you with your best cheap new york jets jerseys in design and price.

Nike Air Max 17/01/2012 05:42

Nike Air Max

base concurrentielle. Société de développement
NikeAirMax89 du produit, comme une auto-générateur record, record de la course. Retour en 1994, la société plusmarchédechaussureblanchebleudeNikeairmax2009+90pourhommeàlavente
a établi sa première usine textile habillement, une auto-développés équipementier sportif; après 18 ans d'exploration, de produits de vêtements de sport à partir d'un développement unique aux vêtements de plusmarchédechaussureblanchegrisenoirdeNikeairmax2009+90pourhommeàlavente sport, chaussures de sport, accessoires de sport, et de nombreuses
Nike Air Max

marque, le football est devenu une série
plusmarchédechaussureblanchebleudeNikeairmax89pourhommeàlavente d'articles dans le domaine des grandes marques du football, les produits sont exportés vers les marchés plusmarchédechaussureblanchenoirbleudeNikeairmax89pourhommeàlavente internationaux. Guangzhou Rui g Sporting Goods Co., Ltd logo du continent eurasiatique est une vie dans la jungle d'un oiseau - "Sun Bird" à cause de qui des éclats plumes brillantes, il est aussi appelé plusmarchédechaussurenoirblanchedeNikeairmax89pourhommeàlavente "Firebird". Sa simplicité d'ensemble, la vitalité, la puissance,
Nike Air Max

Haining la Chine en cuir Ville est devenue célèbre
plusmarchédechaussurenoirargentedeNikeairmax2009pourhommeàlavente marché du cuir professionnelle, a connu une grande réputation. Cuir, ville du cuir des opérateurs à plusmarchédechaussurevioleterosedeNikeairmax2009pourhommeàlavente la ville comme une vitrine de produits, plateforme de trading matières premières, une plateforme de diffusion de l'information, les entreprises étrangères et domestiques dans la ville à l'ordre du plusmarchédechaussurenoirblanchevertedeNikeairmax2009pourhommeàlavente cuir en gros. Les gens dans la région du delta du Yangtsé a une

juggi 16/01/2012 08:11

Superb article mate but how do get your rss feed? Please sending us an e-mail with instructions? Ta

Breckenridge Ski Rental
garage conversions

www.timtebowjerseyshop.com 16/01/2012 04:50

www.timtebowjerseyshop.com
Welcome to www.timtebowjerseyshop.com - The Ultimate Bears Jersey Shop featuring an endless assortment of Bears Jerseys ! We have a huge selection of Authentic,Premier and Replica Bears Jerseys for Men,Women,Youth and Kids. Find your favorite Bears Jerseys and Get Free Shipping and 60 Days Returns Only At www.timtebowjerseyshop.com !

Tim Tebow Jersey

Authentic Tim Tebow Jersey

Tim Tebow Women's Jersey

Tim Tebow Kid's Jersey

Tim Tebow Orange Jersey

Tim Tebow White Jersey

Tim Tebow Replica Jersey

www.ravensjerseymall.com 16/01/2012 04:50

www.ravensjerseymall.com
Welcome to ravensjerseymall.com - The Ultimate Bears Jersey Shop featuring an endless assortment of Bears Jerseys ! We have a huge selection of Authentic,Premier and Replica Bears Jerseys for Men,Women,Youth and Kids. Find your favorite Bears Jerseys and Get Free Shipping and 60 Days Returns Only At ravensjerseymall.com !

Women's Ravens Jersey

Joe Flacco Jersey

Ed Reed Jersey

Ray Lewis Jersey

Ray Rice Jersey

Anquan Boldin Jersey

Terrell Suggs Jersey

Derrick Mason Jersey

Haloti Ngata Jersey

Jarret Johnson Jersey

Jimmy Smith Jersey

Lardarius Webb Jersey

LeRon McClain Jersey

Michael Oher Jersey

Ricky Williams Jersey

T.J. Houshmandzadeh Jersey

Todd Heap Jersey

Torrey Smith Jersey

Willis Mcgahee Jersey


www.patriotsedge.com 16/01/2012 04:49

www.patriotsedge.com
Welcome to www.patriotsedge.com - The Ultimate Bears Jersey Shop featuring an endless assortment of Bears Jerseys ! We have a huge selection of Authentic,Premier and Replica Bears Jerseys for Men,Women,Youth and Kids. Find your favorite Bears Jerseys and Get Free Shipping and 60 Days Returns Only At www.patriotsedge.com !

Patriots Jersey Women's

Tom Brady Jersey

Rob Gronkowski Jersey

Tedy Bruschi Jersey

Wes Welker Jersey

Fred Taylor Jersey

BenJarvus Green-Ellis Jersey

Aaron Hernandez Jersey

Albert Haynesworth Jersey

Andre Tippett Jersey

Chad Ochocinco Jersey

Danny Woodhead Jersey

Deion Branch Jersey

Devin McCourty Jersey

Irving Fryar Jersey

Jerod Mayo Jersey

John Hannah Jersey

Julian Edelman Jersey

Kevin Faulk Jersey

Laurence Maroney Jersey

Leigh Bodden Jersey

Nate Solder Jersey

Patrick Chung Jersey

Patriots Customized Jersey

Randy Moss Jersey



shoes 2011 16/01/2012 03:54

Wedding is one of those occasions that bathrobe Womens Supra. This is abnormally so for the ladies. There are abounding options for womens shoes that one can accept from. If these shoes are for the Asics Discount Shoes, again they charge to be able-bodied called either to bout or to advance agreement for the Adidas Js Wings For Sale.

ugg 14/01/2012 10:05

ugg boots

bound feet, UGG Earmuff with skin made to go someplace modern leather shoes, wearing leather shoes history quite a long history. In China, the modern shoes production is only 120 UGG Classic sheepskin wool brown earmuff years of history, but because the modelling of leather shoes, design, structure UGG Classic sheepskin wool Pink earmuff and function in

cheap ugg boots

which UGG Australia Fox Boots made of leather tanning born without shoes that Di grass, with ripe skin of shoes that Light gray UGG Australia Fox Boots wei Di tanning. Leather shoes than cloth shoes rugged, waterproof, permeability is a bit poor. Can formal occasions to wear, also can wear leisure time. UGG Australia pink Pteris Fox Boots Many styles. The

ugg boots on sale

cool UGG Print Flower boots and dry place. Editor this period of shoes origin Thousands of years ago, the ancestors Black gold Print Flower ugg Boots of human beings have the habit of wearing shoes, dressed in animal skins bound feet, with skin made to go someplace modern leather shoes, wearing Beige Yellow ugg Print Flower boots leather shoes history

cheap Ugg Monster 14/01/2012 06:25

UGG Boots

The precise amount of fur to create a sense of bohemian style of the boots so gorgeous texture increasedUGG Australia Fox Boots, with two goals cute fluffy ballUGG Roxy Tall Boots, walking all swaying, lovely double OhUGG Fringe Cardy.
http://www.uggonlinesaleshop.com



Monster Headphones

Performance, since the continuation of the series has always been the magic sound designMonster Diddy Beats By Dr Dre Headphones with Control Talk High Performance Professional black, flat wire to continue its "line never wound" featureMonster Beats By Dr Dre studio Headphones High Performance Professional black. Select the "heart" headphones, choose fashion, so you start different, Chelsea extraordinarydesigner cheap Monster Beats By Dr Dre Lady Gaga Headphones with Control Talk High Performance Professional white.
http://www.monsterheadphonesales.com

kllkk 14/01/2012 05:00

All subtle Cheap Louis Vuitton Handbags with the exotic elements, the continuation of the discount Louis vuitton, courage to show my true nature, Louis Vuitton outlet online that the women of the charm and the Burberry bags model of the new avant-garde inspired. Clarks Shoes Store omnipresent penetration of the last of Coach Bagsjewels of Pilgrim of the normal elements Cheap Coach Bags the fresh and soft flowers, or of Coach Bags posting to change colors, soft Coach Outlet Online, Yang Zhao made n' import which subtle interaction; Coach Purses Outlet color d' enamel, model of model and stones Coach Handbags On Sale a linkage d' free space in the valley like a peace Coach Outlet Store Online dream and comfortable. The d' variety; accessories of Coach Outlet Store Online of models of the pilgrims, Coach Handbags Outlet also in l' thick of the savage, intelligent use Coach Handbags Outle the traditional short boots " BOLD" and exaggerated Sunglasses Shop discount UGG design the elements, the release of the temperament Sunglasses Shop an extraordinary woman. New the autumn and winter Designer Sunglasses Pilgrim 2010 inspired by l' history Red Sunglasses of the independent series d' independent Cheap Sunglasses independent of attracting series, l' perfect individuality Sunglasses Shop independent exposure and women, to create a single image Chanel Outlet Shopping the representation. Details of l' metal element and Coach Purses a simple symbol of feather of freedom and l' independence, buy traditional sweet chestnut Coach Outlet Stores boots of shorts 5825, bringing the most popular tendencies Coach Outlet Store the season. The force of the ground Coach For Sale the power of the planet ground of Coach Outlet Online energy distributed and of the dynamism Coach Store the center of family, the power Gucci Outlet Store the ground, its mark is a single manner Gucci Handbags Outlet give to people a major impression. In the life, handbags replica to the carrier the power to makeLouis Vuitton Belts good choice. Coach Online Store Courage, courage d' to dare to Coach Outlet Sale something new family inherited d' a series Coach Outlet' a utility of modern Cheap Sunglasses of large and exaggerated design Scandinavian Ray Ban Sunglasses, elements of rock to create Designer Sunglass image attracting of us-hyun. Coach Purses Mix the traditional cheap boots Coach Store shorts of mixer 5825 materials Coach Store play of originator d' onsale different to create this Chanel Outle, will change after much Chanel Online metal elements with l' after use very different. Chanel Shop the beautiful ones hones and metal,Baseball Cap create a gleaming and expressive Cool Caps series of music. Hermes Online Great attention of basic salary louis vuitton outlet store the basic elements Desinger Handbags the series of soft normal colors of the flowers and Cheap Handbags subtle interaction, perfect combination Handbag Outlet Online the soft organic forms Handbags For Cheapcomfortable comfortable comfortable family Cheap Handbags Online, with l' single image of the Handbags On Sale, while avoiding ends.UGG AUSTRALIA United States Prada Shoes Australia local boots, Prada Shoes the first choice of high quality wool skin in Prada Shoes, the United States, China Louis Vuitton Outlet recent years have begun to use domestically produced exports meet international standards of Handbag Outlet Online.

cheap ugg boots 14/01/2012 02:21


Leather lace, Navajo patterns, metal stirrups and other elements have highlighted the most popular boots added a rich decorative details and the exotic. cheap ugg boots for sale Series of clear thick crust wedge with the fashion trend, desert boots and the series will be low-key fashion to the extreme interpretation. cheap ugg Retro wooden heeled high-end series with 4-inch, dark wood base, more elegance, exaggerated the details of the accessories, ugg boots fashion design and full of glossy leather to give a single product brand new style. Cailyn this boots as one of the main series of products, cheap uggs made of light skinned, and the boots in the upper part of the weave pattern of Navajo jewelry as a decoration, ugg boots sale autumn and winter 2011 UGG boots are the most representative of a series.UGG Winter 2011 grand launch of the thick bottom wedge series, ugg boots cheap this is a clear fashion trend of the new series is also excellent material, exquisite details non-negligent exploration. uggs for women The entire series both fashionable and comfortable advantage, using the upper range of classic Italian leather and soft suede full grain leather manufacturing, ugg for sale highlights the unparalleled comfort feel. Shaping wedge series (Sculpted Wedge Collection) fully embodies the characteristics of minimalist fashion.

uggs 2011 14/01/2012 01:45

Genuine practical in terms of snow boots or leather shoes are very dirt, especially the soles, very easy to stick dust. If you go home daily, you can take the hair dryer (must be cold! Absolutely can not use hot air!) Purge again on it, uggs boots outlet blowing a couple of months time, time not too long, two minutes is sufficient. Best support plate placed inside the shoes, did not replace the newspaper, was also very effective. Glossy paper can not, the best general newspaper, you can also go to moisture and odor, not filled, can sustain up like a little, leaving gaps. Put out plastic bags, not sealed, placed in dry shade. uggs outlet Although professional cleaning agent can be washed off, but the feeling will fade, off a small piece of felt awkward. You can use soap or soap powder (washing powder detergent soap that is definitely not), which played in the palm of the hand foam, and then use a small makeup brush, dipped in oil bubble a little bit of brush where the brush with a tissue after the bubble sucked. This trick of light snow boots still very appropriate, uggs cheap especially yellow, because the water point to quit that place painted soaps, discoloration or oxidation. But the feeling of soap powder, a place to stay will slowly yellow hair, pale unlikely to see it. Dark, pale makeup water can be used to take care over what shoes, paper to smoke, not to meet again with water. Not recommended to use soap powder ugg snow boots shoes, as is the spread in the same gentle grinding mill again. cheap uggs boots No insurance, then do not know what changed. And decontamination of the effect is not strong, fade is not obvious, but also lost its original texture. Nothing seemed to work than the professional cleaner more obvious, and washing with taste, hair becomes a little fall, but for cleanliness, do bear fruit quickly and clearly. Another way is to use the bath powder to wash Totoro, the effect is good, but after the best upside down with a hair dryer to blow, uggs boots shook an empty two or three days wear. Because bath powder is very fine particles, clean, hard to shake. In fact, as long as the usual attention to cover up with bags, personal hygiene maintenance, inner hair dirty or difficult. Fold is not recommended to expose the inner hair snow boots to wear. If you have folded up the habit of wearing the best boots in the home to turn back the original look to place, because the toes when walking off India and parts of the fold and India are the most obvious sign of aging, uggs boots women the two parts of the plot easy to dust, often also to hold up to the release, pay special attention to maintain it.This sheepskin boots from the beginning in 1910, became popular among shearers, sheep shearing, was taken from a small piece of sheepskin, after pruning, to wrap their feet, they call this shoe is ugly boots, World War II, the Australian pilot with two pieces of sheepskin wrapped into the shoes to wear in the feet warm, ugg boots on sale then gradually became popular in Australia. In the past, the Australian Air Force, first discovered the snow boots (Ugly Boots) of the wonderful features, it is the wool inside, the outside is very light tanning too soft sheepskin, designed to go to design, remain the same, all round circle of the brain. On a plane knows that (so to speak tone is very small), the pilot flew high-altitude, cheap ugg boots long time motionless feet, most likely to feel cold, so the Air Force boots have proven to be the most thermal effects, so the snow specified by the Australian Air Force boots made on dedicated boots, it was to be called FUGG, is Flying Ugly boots.

Artikelen tot van

Reageren

Invoer verplicht
Invoer verplicht
Invoer verplicht

 

 
















 
Nieuwste Producten - C2W LabNews

[ Nieuwste Producten ]

C2W LabNews is een uitgave van Beta Publishers.
© 2012 www.c2wlabnews.nl - alle rechten voorbehouden.