The Detection of Ammonia Using Gas Sensros Essay

The Detection of Ammonia Using Gas Sensros Essay

Length: 747 words (2.1 double-spaced pages)

Rating: Better Essays

Open Document

Essay Preview

Detection of ammonia can be done using gas sensors. Examples of different application areas of ammonia gas sensing are; environmental monitoring, medical diagnostics, chemical laboratories and detection of ammonia in portable water and wastewater (Timmer et al., 2005). High concentrations of ammonia are easy to detect while for very low concentrations we require different gas sensors operating at different sensing principles. Ammonia gas sensors operate at different temperatures each having a specific detection limit range and response time to measure the ppm and sub-ppm concentrations rapidly. Commercial ammonia sensors make use of different techniques for ammonia detection and can be classified as metal oxide sensors, conducting polymer detectors, catalytic ammonia sensors and optical sensors. The ammonia gas sensors should be considered on basis of cost, maintenance, installation and most importantly specific sensors for the suitable application.
Metal oxide ammonia gas sensors are most widely used and are usually made up of tin i.e. SnO2 sensors (Zakrzewska, 2001). These sensors are inexpensive and are based on the principle of conductance change which arises due to the chemical adsorption of molecules of the ammonia gas on a sensing layer. Selectivity and sensitivity of these sensors towards the ammonia gas can be enhanced by using additives which will drive the adsorption of the gas molecules. Using additives like Au and MoO3 ammonia sensors can achieve the detection limit of 1 ppm. Metal oxides sensors have a detection limit in the range of 1 to 1000 ppm and operates at above 400 0C. In applications like environmental monitoring and detection of combustion gases these sensors are quite helpful.
Sensors made up of polyme...

... middle of paper ...

...ysis is required. The use of non selective detectors with gas samplers is also a good selective technique to measure ammonia accurately. Table 1 (Timmer et al., 2005) summarizes all the parameters of different types of sensors used for the detection of ammonia. In the methodology section plan of experiments using sensors to detect ammonia in water will be presented. However there are two methods described by the EPA to detect ammonia in water bodies. The first method (Method 350.1) is the distillation method in which the sample is first buffered and then is distilled into boric acid. The ammonia concentration is directly proportional to the indophenol blue which is formed (SEMI, 1993). In the second EPA method (Method 350.2) the sample is distilled into boric acid and the ammonia concentration is determined either titrimetrically or colorimetrically (SEMI, 1993) .

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Ammonia Explosion and The West Fertilizer Company Essay

- West, Texas is a town located in McLennan County in the central part of Texas. It has a population of around 2,800 people. During the evening of Wednesday the 17th April of 2013 a massive explosion occurred in the small town. The West Fertilizer Company; which is owned by Adair Grain Inc. which had stockpiles of anhydrous ammonia and ammonium nitrate amongst other agricultural items; was the center and cause of the blast. It is not the first time that an explosion such as this has happened in the state of Texas; in 1947 in Texas city, Texas an explosion that caused nearly 600 deaths had ammonia as a key part in the blast (Jonsson, 2013)....   [tags: Anhydrous Ammonia, Texas, Explosions]

Better Essays
975 words (2.8 pages)

Ammonia Essay

- Ammonia (NH3) is a very imperative substance or product that is used day to day in everyone’s lives. Ammonia (NH3) is used to produce fertilizers, household cleaning products and is the starting material for many explosives and many pharmaceutical products. Ammonia (NH3) is also used to create nitric acid (HNO3), also a very crucial substance used in our daily lives. The Haber process is the industrial process for the manufacture of ammonia (NH3) from hydrogen (H2) and nitrogen (N2), if not for the Haber Process there would be massive shortage and impact of ammonia (NH3) in our lives, hence higher rate of famine and more time to clean household products and creation of pharmaceutical product...   [tags: Ammonia, Nitrogen, Ammonium nitrate, Nitric acid]

Better Essays
1332 words (3.8 pages)

Autonomous Detection of Botnets Using Passive DNS Essay

- 1 Background A botnet is a collection of compromised hosts (bots) under control of a com- mon Command & Control (C&C). The C&C is used by a remote controller to issue commands to the different infected hosts. A botnet may have several purposes, the most common include Denial-of-Servoice (DoS) attacks, identity theft, proxy, spreading of malware and spamming. Traditional ways to disrupt such networks, such as Domain Name System Blacklists (DNSBL’s) or firewalls, rely on the knowledge of the Internet address of the C&C....   [tags: control, identity, internet]

Better Essays
729 words (2.1 pages)

Issues Raised by Use of Turnitin Plagiarism Detection Software Essay

- Issues Raised by Use of Turnitin Plagiarism Detection Software This past week, I worked with a couple of other members of the Writing Department at GVSU to prepare a position statement on plagiarism detection software. GVSU only recently acquired a subscription to Turnitin, and myself and the other teachers were concerned that teachers in other disciplines would be unware of the issues surrounding plagiarism detection services. The following is the full text of the statement which has been distributed on our campus....   [tags: Plagiarism Detection Software]

Free Essays
949 words (2.7 pages)

Using Synthetic Nitrogen Fertilizer ( 335 Follett ) Essay

- It was the early 1900s when a process that forever changed industrial agriculture was developed; farmers were able to grow up to three times the amount of crops than they had previously by using synthetic nitrogen fertilizer (335 Follett). Consequently, use of inorganic fertilizer spread across the globe and the amount being used climbed to incomprehensible numbers. Production of food was skyrocketing, and it looked as if farming would never again return to its once traditional methods… until we realized that there was such a thing as too much nitrogen in the environment....   [tags: Fertilizer, Nitrogen, Ammonia, Ammonium nitrate]

Better Essays
1259 words (3.6 pages)

Automatic Surveillance: Vision Detection Using Gaussian Processes Analysis

- ... Pixels of sharp variations are consequently classified into the foreground. Many techniques have been established to work in the frame of this principle among which we can list: the running average [1] [2] that interest in modelling the background each pixel location by fitting a Gaussian probability density function (Pdf) on the last n pixel’s values. At each frame time, the pixel's value can then be classified as a foreground pixel if the difference between its values and the estimated mean values exceeds a given threshold....   [tags: detecting moving objects, application]

Better Essays
625 words (1.8 pages)

Smart Phishing Url Detection Using Association Rule Mininga Seminar Report

- Intelligent phishing url detection using association rule miningA seminar report submittedtoMANIPAL UNIVERSITYFor Partial Ful llment of the Requirement for theAward of the DegreeofBachelor of TechnologyinInformation TechnologybyHriddhi DeyReg. No. 130911388September 2016 AbstractPhishing is an online criminal act that occurs when a malicious webpage im-personates as legitimate webpage so as to acquire sensitive information from theuser. Phishing attack continues to pose a serious risk for web users and annoyingthreat within the eld of electronic commerce....   [tags: World Wide Web, Web page, Web search engine]

Better Essays
1365 words (3.9 pages)

Ammonia Synthons for the Multicomponent Assembly of Complex Y-Lactams Essay

- Five-membered ring lactams, known as γ-lactams, are important structural motifs in biologically active natural products, but γ-lactams that are substituted at the 1-position (nitrogen) are less common in drug leads. Although the substituted γ-lactams and the unsubstituted γ-lactams share the main γ-lactam core, a major difference between the two is the substitution at the nitrogen; the unsubstituted γ-lactams are also known as N-H lactam. This difference is substitution is seen in Figure 1 through a natural product Heliotropamide,[1] a γ-lactam substituted at the 1-position and Salinosporamide,[2] a γ-lactam unsubstituted at the 1-position....   [tags: Five Membered Ring Lactams, Natural Products]

Better Essays
1303 words (3.7 pages)

Essay on Investigating the rate of diffusion of ammonia

- Investigating the rate of diffusion of ammonia Investigating the rate of diffusion of hydrochloric acid in agar Planning You can change different things you do to an experiment like the amount of acid, temperature, size of the agar or concentration of the acid. We can measure/observe on how long it takes to diffuse or the amount diffused each minute. My partner and I are going to predict and measure the rough time it will take to diffuse at different temperatures. The factors that may affect the readings of our results are if the temperature of the room may reduce the temperature of our water baths or if the windows open....   [tags: GCSE Chemistry Coursework Investigation]

Free Essays
1232 words (3.5 pages)

Haemochromatosis Detection Essay

- HAEMOCHROMATOSIS DETECTION USING PCR-RFLP INTRODUCTION Hereditary Haemochromatosis (HH), first described in 1865, is a genetic disorder of metabolism, characterized by progressive iron overload resulting from abnormalities in intestinal iron absorption and or release of iron from reticuloendothelial cells . It is an autosomal recessive disorder, where the body accumulates excessive iron, which is deposited in a variety of organs. Iron cannot be excreted, thus, the excess builds to toxic levels in tissues of major organs such as the liver, heart, pituitary, thyroid, pancreas, lungs, and synovium (joints)....   [tags: essays research papers]

Better Essays
2766 words (7.9 pages)