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Title:Silicijev dioksid kot osnova za pripravo senzorskih receptorjev
Authors:Popović, Luka (Author)
Lobnik, Aleksandra (Mentor) More about this mentor... New window
Turel, Matejka (Co-mentor)
Files:.pdf MAG_Popovic_Luka_2020.pdf (3,20 MB, This file will be accessible after 31.01.2023)
MD5: 51133597749806E8E96814F010043E8A
 
Language:Slovenian
Work type:Master's thesis/paper (mb22)
Typology:2.09 - Master's Thesis
Organization:FS - Faculty of Mechanical Engineering
Abstract:V okoljevarstvu je spremljanje okoljskih parametrov ključnega pomena za nadzor mejnih koncentracij, ki so lahko usodne za žive organizme. Obstoječe in standardizirane metode za določevanje različnih okoljskih parametrov so dolgotrajne, zahtevajo posebno pripravo vzorca in visoko usposobljeno osebje. Zaradi navedenega se kaže potreba po razvoju alternativnih metod zaznavanja z aparati, ki so majhni, prenosljivi, natančni in enostavni za uporabo. Eno takšnih alternativ predstavljajo optični kemijski senzorji. V sklopu tega magistrskega dela smo pripravili senzorske receptorje v obliki membran na osnovi silicijevega dioksida. Vanje smo vgradili pH indikator, s katerim smo zaznavali različne koncentracije amonijaka v raztopini in v zraku. Razvili smo senzorske receptorje, ki so zaradi občutljivosti na amonijak v območju 1,7-100 ppm potencialno primerni za opravljanje zakonodajno predpisanih meritev amonijaka v zraku na delovnih mestih in v gospodarskih objektih (mejna vrednost v obeh primerih znaša 20 ppm). Senzorski receptorji za merjenje raztopljenega amonijaka v vodi so se odzivali v območju (0,0096-67,7 mg/L), kar nakazuje možnost njihove uporabe v namene meritev mejnih vrednosti amonijaka v salmonidnih in ciprinidnih površinskih vodah (po slovenski zakonodaji znaša mejna vrednost 0,025 mg/L). Prav tako smo podali smernice za prihodnje izboljšave senzorja pri meritvah amonijaka v zraku in v vodi.
Keywords:silicijev dioksid, optični kemijski senzorji, amonijak
Year of publishing:2019
Place of performance:Maribor
Publisher:[L. Popović]
Number of pages:XI, 50 f.
Source:Maribor
UDC:543
COBISS_ID:23084822 New window
NUK URN:URN:SI:UM:DK:IGQ64JT5
Views:584
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Categories:KTFMB - FS
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:13.12.2019

Secondary language

Language:English
Title:Silicon dioxide as template for the preparation of sensor receptors
Abstract:Monitoring of environmental parameters is being paramount in protection of living organisms. Current standardized methods are complicated and require long measurement time. Therefore the need for small, portable, precise and easy to use devices is on the rise. Optical chemical sensors combine those characteristics well and represent valid alternative. In this thesis, we prepared silica sensors with incorporated pH indicator for aqueous and gaseous ammonia detection. We developed sensors, capable of gaseous ammonia detection in a range of 1,7-100 ppm which make them suitable for law enforced measurements in workplaces and other facilities (threshold value is set at 20 ppm). Sensors for aqueous ammonia measurements were responding in the range of 0,0096-67,7 mg/L which implicate possibility of using them for law enforced dissolved ammonia measurements in salmonid and cyprinid waters (threshold value is set at 0,025 mg/L). We also suggested different guidelines for further improvements of ammonia sensor for measurements in aqueous and gaseous environment.
Keywords:silicon dioxide, optical chemical sensors, ammonia


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