20.500.12556/DKUM-14714 POTENCIOMETRIČNO DOLOČANJE N-(2-MERKAPTOPROPIONIL)-GLICINA POTENTIOMETRIC DETERMINATION OF N-(2-MERCAPTOPROPIONYL)-GLYCINE Diplomsko delo opisuje potenciometrično določanje N-(2-merkaptopropionil)-glicina z uporabo različnih ionoselektivnih elektrod, njihove odzivne čase, ponovljivost, delovno območje, meje določljivosti in uporabnost v pretočni injekcijski analizi(PIA). Pri kemijski obdelavi srebrne žice v živosrebrovem (II)kloridu je na površini nastala siva plast, ki se je v raztopini MPG obarvala rahlo rjavo do rjavo rdeče. Delovno območje Ag/AgMPG elektrode je med 1x10-2 mol/L in 1x10-5 mol/L MPG pri naklonu 49,0 mV/p(MPG). Srebrna žica obdelana v raztopini živosrebrovega (II) klorida in nato potopljena v Na2S je na površini prevlečena s tanko črno plastjo srebrovega sulfida. Delovno območje te elektrode je med 1x10-2 mol/L in 1x10-5 mol/L pri naklonu 58,2 mV/p(MPG). Srebrna žica kemijsko obdelana v raztopini živosrebrovega (II)klorida in nato potopljena v raztopino KI tvori na površini rumenkasto plast srebrovega jodida. Delovno območje Ag/AgI elektrode je med 1x10-2 mol/L in 3x10-5 mol/L pri naklonu 52,7 mV/p(MPG). Tako pripravljene elektrode so primerne za klasične in pretočne potenciometrične meritve. The study describes potenciometric determination of N-(2-mercaptopropionyl)-glycine (MPG) using different types of electrodes, their response time, their repeatability, working range, detection limit and their use in flow injection analysis (FIA). After the silver electrode was immersed into the solution of mercury (II)chloride, was on the surface gray layer which become slightly brown to brownish red when we immersed electrode into solution of MPG. Working range of Ag/AgMPG electrode is between 1x10-2 mol/L and 1x10-5 mol/L MPG with the slope of 49,0 mV. Sulfide ion-selective electrode was prepared with chemical pretreatment of the silver wire with mercury (II)chloride and solution of Na2S. On the surface thin black layer of silver sulphide was formed. Working range of this electrode is between 1x10-2 mol/L and 1x10-5 mol/L MPG with the slope of 58,2 mV. Silver wire chemically pretreated with mercury (II)chloride and the solution of KI, formed on the surface yellow layer of silver iodide. Working range of the electrode is between 1x10-2 mol/l and 3x10-5 mol/L with the slope of 52,7 mV. Electrodes prepared in such a way can be used in batch and flow injection measurements also for determination of N-(2-mercaptopropionyl)-glycine in real samples. N-(2-merkaptopropionil)-glicin pretočna injekcijska analiza ionoselektivne elektrode potenciometrija N-(2-mercaptopropionyl)-glycine flow injection analysis ion-selective electrodes potentiometry true true false [S. Očko] Slovenski jezik Angleški jezik Diplomsko delo 2010-06-30 13:55:28 2010-07-20 12:35:35 2022-04-12 22:15:39 2023-12-18 03:16:42 2010 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 543.554.547.466.22(043.2) 14401558 URN:SI:UM:DK:4MB3FL6K UNI_Ocko_Simona_2010.pdf UNI_Ocko_Simona_2010.pdf 1 E038ABBCE8171863BEC0F30325F9C615 0d0f3f7cb693ed33923da47d4f4b3490fcd844718edfb0ec42c04417a5ddb0ed 380b203d-7c04-11eb-bb7a-00155d0001ca 20.500.12556/dkum/230da11b-6730-45b8-bd75-7ea022ac3257 https://dk.um.si/Dokument.php?lang=slv&id=15886 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0