Analytical Essay

Gold samples with five replicates of approximately 0.2g was carried out by acid digestion using a solution containing 15mL of 35% Hydrochloric acid and 5mL of 69% of nitric acid in the presence of 10mL de-ionized 18.2M Ω resistivity water of analytical grade per sample. Samples were weighed using

service provider in the context of Indian cement industries by using Analytical Hierarchical Process (AHP). Not much research work is done in this area & in the cement industry sector. Hence, the findings of the current research will form the guidelines for the criteria’s on which the 3PL service provider should be selected. The steps involved in the AHP methodology are discussed in the following sections of the paper. 3.1 Analytical Hierarchy Process

Introduction: Chromatography is a technique used by scientists to separate a mixture, known or unknown, into each component present in the mixture. For chromatography to be completed there has to be a mobile and stationary phase present. The mobile phase in chromatography is any liquid or gas containing the substance to be separated. The stationary phase acts as a magnet in which certain substances will be more attracted to than others and each different component will travel up in a unique pattern

Co-precipitation Co-precipitation is an important technique widely used for separation and pre-concentration of analytes from various samples [examples]. It is adopted when direct precipitation cannot separate the desired metal ions due to their low concentrations in the sample (Bulut VN et al. 2008). Various mechanisms including surface adsorption, ion exchange, surface precipitation and occlusion are involved in co-precipitation technique [ ]. Metals, at trace levels, react with an organic or inorganic

Introduction to Gas Chromatography Jeffrey Palumbo ID: 20523300 Chem 224L Section 003 Partner: Victor Łotocki Date of Experiment: June 17, 2015 Introduction Gas chromatography is a common separation technique used in analytical chemistry to separate, identify and quantify the compounds present is a sample (Harris, 2010). The purpose of this experiment is to analyze a sample of TEX (toluene, ethyl benzene, and o-xylene) and identify the peaks from the resulting chromatogram. Another objective

EXPERIMENT : Iron in Breakfast Cereal by Atomic Absorption Spectroscopy OBJECTIVES : 1) To determine the actual iron content of different brands of cereals 2) To compare the experimental results with the values listed on the manufacturer’s labels. INTRODUCTION : Iron is one of the important minerals that is required for our bodies to function properly. Most of the iron in our body is found in the blood such as haemoglobin, approximately 60 -70% of the human body’s iron is found

Computer has been an important gadget in many peoples life. Computers come in various design, size and types. For example, there are computers that needs to be placed on the desk or on a flat surface like the desktop computer and the laptops. Where else we have the computers that can be carried along with us like the mobile phones and tablets. Computers are so important that it is used to communicate by billions of people. For example people use computer for far distance communication like sending

together to form the sample under investigation. The identification can be determined once the sample is placed in a liquid or when absorbed on a solid surface, and the separation of the molecules becomes either mobile or stationary. This basic analytical technique is beneficial with classifying drugs that has been collected from a crime scene and transported to a crime laboratory for analyses. There are four main variations of chromatography, however, Gas Chromatography is the most widely used technique

THE USE OF CHEMISTRY SEPERATION TECHNIQUES IN FORENSIC SCIENCE “Poisons were employed by early Egyptians and ancient Greeks and Romans. The Blandy trial of 1752 was the first instance of an actual chemical test for poison, and the Marsh test, developed in 1836, was the first reliable analysis that could show scientifically that arsenic was present in the body of a victim. This meant the revolution of applying science to questions of civil and criminal law.” Chemistry Explained (2015) Advameg, Inc

Figure 4.3: Linearity graph of Lamivudine Figure 4.4: Linearity graph of Zidovudine Figure 4.5: Linearity graph of Nevirapine Table 4.4: Linearity results of Lamivudine, Zidovudine and Nevirapine Parameters Lamivudine Zidovudine Nevirapine Concentration range (µg/mL) 15-75 30-150 20-100 Correlation coefficient 0.999 0.999 0.999 Intercept 518.9 610.7 234.2 Slope 4681 3761 3754 4.3.1.3 Accuracy (% recovery) The accuracy parameter conducted by using the standard addition method. The proposed method