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  • KPK – Kemijska Poraba Kisika - Hanna Instruments Slovenija
    temperature ATC Vrednosti pH so izrazito odvisne od temperature pri kateri so bile izvedene meritve V primeru da tega ne upoštevamo lahko privede do napačnih meritev Prav zaradi tega večina HANNA merilcov pH ponuja možnost da se avtomatsko kompenzira spremembo temperature s pomočjo senzorja za temperaturo samostojen ali vgrajen v elektrodo za pH Na ta način boste vedno dobili točne meritve HANNA merilci pH ki pa ne ponujajo možnosti avtomatske kompenzacije temperature imajo na razpolago ročno kompenzacijo temperature Avtomatska kompenzacija temperature ATC Vrednosti pH so izrazito odvisne od temperature pri kateri so bile izvedene meritve V primeru da tega ne upoštevamo lahko privede do napačnih meritev Prav zaradi tega večina HANNA merilcov pH ponuja možnost da se avtomatsko kompenzira spremembo temperature s pomočjo senzorja za temperaturo samostojen ali vgrajen v elektrodo za pH Na ta način boste vedno dobili točne meritve HANNA merilci pH ki pa ne ponujajo možnosti avtomatske kompenzacije temperature imajo na razpolago ročno kompenzacijo temperature Elektrode za pH Linija elektrod za pH HANNA je izdelana v anših sodobnih tovarnah Na voljo so s telesom ki je lahko steklen plastični titanijski ali tudi iz drugih materijalov specifičnih za različne aplikacije Nekaj lastnosti naših elektrod 1 Elektrode s polčlenom referenco ali kombinirane elektrode V preteklosti so se uporabljale dve elktrodi elektrodo za pH in referenčno elektrodo pH meter je meril razliko med napetosti obeh in tako izračunal pH Dandanes je bolj običajno uporabljati samo eno elektrodo kombinirano ki vključuje obojne komponente v eni sami elektrodi 2 Referenčni spoj Elektrode za pH lahko imajo enojni anli dvojni spoj Elektrode z enojnim spojem Večina konvencionalnih elektrod je takega tipa Te elektrode predstavljajo referenčni polčlen v neposredni komunikaciji z zunanjim svetom Komunikacija se izvaja preko keramičnega spoja Elektrode z dvojnim spojem Referenčni polčlen ima prostor za merjenje tako kot tudi še dodatni prostor kjer se nahaja referenčni element Oba polčlena sta v komunikaciji med sabo preko notranjega spoja Taka razporeditev omogoča večjo vzdržljivost elektrode manjše onesnaženje in manjše zamašitve A Zmanjševanje onesnaženja Kot prikazano v spodnji sliki v neugodnih razmerah kot na primer pri visokemu tlaku visoki temperaturi izrazito kisle ali alkalne raztopine se lahko pozitivni tok elektrolita preko spoja preobrne in tako povzroči da vzorčna raztopina vstopi v elektrodo V takem primeru se elektroda kontaminira in pokvari V primeru dvojnega spoja je samo ena od dveh spojev v neposrednem stiku z vzorcem V neugodnih razmerah tudi tukaj lahko pride do tega da vzorec vstopi v notranjost elektrode Glede na to da je referenčna elektroda fizično ločena od vmesne elektrolitične cone je kontaminacija zmanjšana To pomeni da se podaljša življenjska doba elektrode B Redukcija spojne zamašitve Ionski vpliv je pogost vzrok za zamašene skupne spojne elektrode AgCl je manj topen v vzorcu v primerjavi z raztopino referenčnega elektrolita Potemtakem ko elektrolitska raztopina pride v stik z vzorcem določena količina AgCl obori na zunanjem delu spoja To lahko privede do zamašenja spoja in do napačnih meritev zlasti v primeru ko elektroda ni pravilno očiščena Pri elektrodah z dvojnim spojem je predelek v neposrednem

    Original URL path: http://hannaservice.si/sl/kpk-kemijska-poraba-kisika/8-slovensko (2016-04-28)
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  • Motnost - Hanna Instruments Slovenija
    artiklov Seznam znižanih artiklov ažuriramo redno vendar vas vljudno prosimo za razumevanje v primeru da želenega artikla trenutno ni več na voljo Cene so brez DDV HI143 T Logger z možnostjo stenskega zaklepanja Prijavljanje preko računalnika s pritiskom na gumb ali ob določenem času Selektivni interval vzorčenja od 1 minute do 24 ur Do 4000 zabečeženih vzorcev Min Max izmerjenje vrednosti se shranijo in prikažejo Varnostno geslo Vodoodporna zaščita Cena 58 00 HI98103 C hecker pH tester Visoka natančnost z ločljivostjo 0 01 pH Dve hitri točki in natančna kalibracija Združljiv s skoraj vsako elektrodo ki si deli isti priključek 3000 ur življenske dobe baterije HI 1270 sonda majhnega premera se enostavno prilega v epruveti Cena 25 50 HI1026 2505 Industrijsko ploska pH elektroda pH elektroda z odprtim stičiščem GP senzor s žicami Pt1000 5 meterski kabel 498 35 Cena 398 68 HI142CH Temperaturni zapisovalnik podatkov 1 2 kanala z notranjim senzorjem LCD zaslon 16 000 vzorcev kanalov 1 kanalni model ali 8 000 vzorcev kanalov 2 kanalni model Interval prijavljanja ki traje od 1 sekunde do 24 ur Programabilni visoki in nizki alarmi Vodoodporno ohišje sistem za zaščito napak pri delovanju baterije Razpon 20 0 do 70 0 C 114 76 Cena 91 81 Potrebna dodatna oprema HI141000 Programska oprema Windows HI141001 I nfrardeči oddajnik Checkerji HC serije in kolorimetri Checkerji Reagenti za Checkerje HANNA Checkerji HC HANNA Checkerji HC premostijo prepad med enostavnemu kejiskimu test kompletu in profesionalnem instrumentom Kemijski test kompleti niso dovolj natančni ter dajo samo od 5 do 10 točk resolucije medtem ko pa profesionali instrumenti so lahko zelo dragi in potrebujejo časa za kalibracijo in oskrbo Checkerji HC so prava rešitev saj so natančni in cenovno ugodni Checkerji HC so ravno prave oblike in dimenzije da jih lahko imate na dlani ali v žepu Njihov velik LCD zaslon pa je izrazito enostaven za pregledovanje odčitkov S funkcijo avtomatičnega izklopa ste lahko popolnoma mirni in vam ni potrebno skrbeti da bi se baterija spraznila v primeru da pozabite ugasniti vašega Checkerja HC Bolj enostavni za uporabo in bolj natančni od kemijskih test kompletov Zelo natančni Razvidni in razumljivi odčitki Samodejni izklop Namenjeni za en sam parameter Izdelani za delo skupaj z HANNA reagenti Uporabljajo 10 mL steklene kivete Majhna oblika velika uporabnost Tehta samo 64 g ravno zato ga lahko imate na dlani ali pa v žepu Idealen za hitre in natančne analize na terenu Ima samo en gumb za opravljanje vseh funkcij postavitev na nulo in merjenje Deluje z eno baterijo AAA Benchtop Turbidity Meters HI 88703 Precision Turbidity Benchtop Meter EPA Compliant HI 88713 Turbidity Benchtop Meter ISO HI 83414 Turbidity and Free Total Chlorine Benchtop Meter EPA Compliant Kemijski test kompleti HANNINI KEMIJSKI TEST KOMPLETI HANNA kemijski test kompleti na enostaven način izvajajo natančne kemijske analize Široka paleta posameznih parameterskih test kompletov ali multiparameterskih kompletov vključujejo kolorimetrično checker disc titracijsko in turbidimetrično metodo Kemijski test kompleti Test kompleti z več parametri Reagenti za kemijske test komplete HANNA kemijski test kompleti ki uporabljajo

    Original URL path: http://hannaservice.si/sl/motnost/11-slovensko/staticne-vsebine (2016-04-28)
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  • Benchtop Turbidity Meters - Hanna Instruments Slovenija
    Instruments se zavedamo da vsak uporabnik ni strokovnjak ki je že seznanjen s pravili vzdrževanja za pH EC ali ORP testerje V tej objavi vam bomo predstavili nekaj nasvetov za uporabo in vzdrževanje vaših testerjev Več Poslovno sodelovanje Ste zainteresirani za poslovno sodelovnje s HANNA Service Za več informaciji kliknite TUKAJ ali nas kontaktirajte po telefonu ali e mailu Benchtop Turbidity Meters Twitter Share on Tumblr HI 88703 Precision Turbidity

    Original URL path: http://hannaservice.si/sl/motnost/11-slovensko/staticne-vsebine/178-podkategorija-benchtop-turbidity-meters (2016-04-28)
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  • Hanna Instruments Slovenija - Hanna Instruments Slovenija
    particles oils and other contaminated particles As the scientists behind hair care progressed manufacturers synthesized chemical additives for use in shampoo as fragrance foaming agents and colored dyes Shampoo is now created and structured towards various hair types as well as to achieve a certain end result such as the reduction of dandruff or greasy hair Both the synthetic and natural ingredients used in a shampoo dictate the pH of that particular product The pH of a shampoo will alter the natural pH of skin and hair which ideally falls between pH 3 and 5 and pH 4 and 5 respectively thereby affecting their physical and chemical makeup Read more Digital Refractometers Twitter Share on Tumblr HI 96801 Digital Refractometer for Sugar Analysis Sucrose HI 96802 Digital Refractometer for Sugar Analysis Fructose HI 96803 Digital Refractometer for Sugar Analysis Glucose HI 96804 Digital Refractometer for Sugar Analysis Invert Sugar HI 96811 Digital Refractometer for Measurement of Sugar in Wine of Brix HI 96812 Digital Refractometer for Measurement of Sugar in Wine Baumé HI 96813 Digital Refractometer for Measurement of Sugar in Wine Brix V V HI 96814 Digital Refractometer for Measurement of Sugar in Wine Brix Oechsle KMW HI 96821

    Original URL path: http://hannaservice.si/en/component/content/article/10-english/210-podkategorija-digital-refractometers-2 (2016-04-28)
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  • Hanna Instruments Slovenija - Hanna Instruments Slovenija
    on Tumblr Published 18 December 2015 Shampoo is a hair care product used for removal of dirt dandruff skin particles oils and other contaminated particles As the scientists behind hair care progressed manufacturers synthesized chemical additives for use in shampoo as fragrance foaming agents and colored dyes Shampoo is now created and structured towards various hair types as well as to achieve a certain end result such as the reduction of dandruff or greasy hair Both the synthetic and natural ingredients used in a shampoo dictate the pH of that particular product The pH of a shampoo will alter the natural pH of skin and hair which ideally falls between pH 3 and 5 and pH 4 and 5 respectively thereby affecting their physical and chemical makeup Read more ISE electrodes Twitter Share on Tumblr HI 4115 Silver Sulfide Combination ISE HI 4011 Iodide Half Cell ISE HI 4012 Lead Sulfate Half Cell ISE HI 4013 Nitrate Half Cell ISE HI 4014 Potassium Half Cell ISE HI 4015 Silver Sulfide Half Cell ISE HI 4007 Chloride Half Cell ISE HI 4008 Cupric Half Cell ISE HI 4009 Cyanide Half Cell ISE HI 4010 Fluoride Half Cell ISE HI 4101 Ammonia Combination ISE HI 4102 Bromide Combination ISE HI 4104 Calcium Combination ISE HI 4107 Chloride Combination ISE HI 4108 Cupric Combination ISE HI 4109 Cyanide Combination ISE HI 4110 Fluoride Combination ISE HI 4112 Lead Sulfate Combination ISE HI 5315 Reference Electrode for ISE Half Cells HI 4111 Iodide Combination ISE FC 300B Sodium ISE HI 4103 Cadmium Combination ISE FC 301B Fluoride Half Cell ISE HI 4002 Bromide Half Cell ISE HI 4003 Cadmium Half Cell ISE HI 4004 Calcium Half Cell ISE HI 4113 Nitrate Combination ISE HI 4114 Potassium Combination ISE HI 5412 Reference Electrode for ISE

    Original URL path: http://hannaservice.si/en/component/content/article/10-english/218-category-ise-electrodes (2016-04-28)
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  • Hanna Instruments Slovenija - Hanna Instruments Slovenija
    aqueous solution that is allowed to equilibrate with room air oxygen constitutes about 20 9 of the total dissolved gas with nitrogen being about 78 some carbon dioxide is present as well These proportions are similar in air and in solution equilibrated with room air The atmospheric pressure on the water surface along with temperature are factors that modify the concentrations of DO and therefore have to be compensated for a correct reading Since dissolved oxygen determination is based on measurement of a current that is established between the anode and cathode the salt content of water is another factor that can influence readings and must also be compensated Click HERE for more information on our products we ll be glad to help you find the right solution for your needs Applications Dissolved oxygen is an important indicator of the degree of usefulness of a sample of water for a specific application Dissolved oxygen can exist in water in different concentrations and is important for the respiration of a wide variety of animals and aerobic bacteria in the aquatic environment Other applications include water treatment plants sewage treatment works effluent activated sludge process river monitoring fish farming and generally any other field where water quality is important Biotechnological processes are another area of applications where dissolved oxygen measurements are essential to maintain quality of the finished product In water quality applications such as aquaculture and fish farming the level of DO must be kept high If the DO level falls too low the fish will suffocate For waste water treatment in sewage treatment bacteria decompose the solids if the DO level is too low the bacteria will die and decomposition stops if the DO level is high there is no need to spend energy in the aeration of the water

    Original URL path: http://hannaservice.si/en/component/content/article/10-english/224-dissolved-oxygen-2 (2016-04-28)
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  • How to Determine the pH Value in Textile Dye Baths - Hanna Instruments Slovenija
    5 respectively thereby affecting their physical and chemical makeup Read more How to Determine the pH Value in Textile Dye Baths Twitter Share on Tumblr Published 03 September 2015 Dyes have been used on textiles for over 6 000 years originating in the time of the Neolithic period Textile dyes are a core aspect of the textile industry for their ability to enhance the aesthetic appeal of fabrics A mordant and its importance Dyes are traditionally derived from animal or plant products although synthetically produced dyes have become popular to increase the variety of colors and resilience of the dyes Often dyes require a mordant A mordant is a substance typically an inorganic oxide which fixes the dye to the textile A mordant may also be used help to retain the intensity of dyes through repeated washes How to determine the optimal pH value of the dyes Dyes are applied to textiles through a wide variety of techniques One common technique is the use of reactive dyeing tanks Reactive dyes are substances that attach to fabrics by way of a chemical reaction the dye chemically bonds to the fiber and is much more resilient to being washed as opposed to dyes that are simply adsorbed This method is used most often for cellulose fibers such as cotton or linen In these cases the dye is added to an alkaline bath where the textile will be treated The high pH of the bath allows the formation of a cellulosate anion from the cellulose in the plant fiber This anion binds with the dye in solution to form a permanent color The optimal pH of many of these dyes is between pH 10 and 11 5 To maintain the correct pH of the bath sodium carbonate is added Portable HI98190 Waterproof pH

    Original URL path: http://hannaservice.si/en/hanna-blog/373-how-to-determine-the-ph-valeu-in-textile-dye-baths (2016-04-28)
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  • How to Determine the Concentration of Gold and Palladium - Hanna Instruments Slovenija
    skin and hair which ideally falls between pH 3 and 5 and pH 4 and 5 respectively thereby affecting their physical and chemical makeup Read more How to Determine the Concentration of Gold and Palladium Twitter Share on Tumblr Published 26 August 2015 Plating is known for centuries and it is still widely used in a modern industry for various purposes Depending on the specific application surfaces may be plated for decorative purposes to provide protection against corrosion or to enhance function Instead of creating products entirely out of metal manufacturers often use plating techniques to coat less expensive materials with a thin metal film These techniques drastically reduce production costs especially when the required materials are precious metals such as gold or palladium Depending on the intended function type of metal plating substrate and several other factors plating industries may employ a number of chemical and electrochemical deposition processes to apply metal coatings to surfaces Many of these processes involve plating baths which are solutions containing source ions of the metal being plated and other components such as buffering and stabilizing agents To ensure the effectiveness of a plating solution it is important to measure the concentration of the plating metal Atomic absorption and emission spectroscopic techniques Several methods are available to analyze specific metals in plating solution Among these atomic absorption and emission spectroscopic techniques are highly accurate selective and can measure a wide range of concentrations However these methods require the use of expensive instrumentation There are a number of gravimetric analytical methods in which the metal is precipitated from the solution and weighed For many of these gravimetric methods the procedures are very intensive Often involving boiling and filtration steps as well as the use of additional chemicals and external equipment which can be costly space

    Original URL path: http://hannaservice.si/en/hanna-blog/363-how-to-determine-the-concentration-of-gold-and-palladium (2016-04-28)
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