Discussion Lab Report Ac 6g4y4q

In Analytical Chemistry, many methods are used to analysis components in a sample. The most common of analytical method is either to identify, to compare, or to quantify which will lead to more exciting methods. One of the methods is by using Fourier Transform Infra red spectroscopy (FTIR). FTIR has become one of the most favourite equipment in analytical method. It is because the least tedious method but easy to conduct. In IR region, absorption of radiation give information about the identification of compounds, the presence or absence of functional groups and structure of the molecules. It is one of premier techniques in qualitative analysis and it is not widely used in quantitative analysis. The range of wavenumber is divided into three parts which are near, middle, and far; each part shows the presence of different functional groups. The main objectives of this experiment are to conduct sample containing, to compare the sample’s peaks in the IR spectrum and to identify impurities from the peaks. In this experiment, the samples used are toothpaste (sample 1) and mouthwash/listerine (sample 2). The readings for sample 1 and sample 2 which are toothpaste (Darlie) and mouthwash (Listerine),were obtained in a form of two spectrums. The transmittance against wave number spectral graph was achieved after the detections of both samples using the ATD Sampling Compartment. Based on the spectrum achieved from the FT-IR, it is shown that sample 1 toothpaste, has a total of 7 wave numbers in which were used in the determination of compound in the sample. In the toothpaste sample, the functional groups detected were hydroxyl, carboxylic acids, alkenes, alkane, alcohol, ether, and ester. For the mouthwash (Listerine) sample, the functional groups are alcohol, phenols, carboxylic acids, alkenes, alkane, amines , ester, and ether were present. For this sample, the type of vibration the functional groups went through was only stretching. The functional groups of each sample can be determined by referring to the Correlation Chart (Shown in Appendices) in order to interpret the spectral graph obtained. A comparison of the samples’ peaks with the standard ingredients was made, to confirm of the actual functional groups present in

the sample. During the experiment, some errors might occur. The errors that might occur are labelled in a variety of fashion, in which one of the causes is the lack of focus in cleaning the ATD Sampling compartment for the detection of the next sample. This error may lead to misreading and may also lead to obtaining a disrupted result. In conjunction to that, another error that may occur while experimenting is the sample chosen. If the sample is contaminated, in which means an impure substance was selected to scan through the FTIR, then the results obtained will be less precise and less accurate and the flow of the experiment will be less efficien t.