The detection and/or identification of trace amounts of explosives. The review of each method should include a description of the way the method works and the advantages and drawbacks of the technique. Introduction An explosive, are reactive substances that contain a large amount of potential energy that can yield an explosion if they are released rapidly, they are accompanied by the production of light, heat, sound, and pressure. Mainly used in the mining industry for extraction of minerals
which toxic ions might be present in a sample. Chromatography is one of the first tools used in such situations. In this technique, many types of mixtures can be separated into the component pure substances; by comparison to a standard sample, each component substance can also be tentatively identified. Many varieties of chromatography exist, each one designed to separate specific types of mixtures. The common feature of each type of chromatography is that a mobile phase (a liquid or gas) is pushed
are made in laboratories by people who are unskilled and untrained. Urine There are two steps for testing of drugs. One is screening and the other is confirmatory test. Screening test is used to find the presence of drug or to identify a specific drug. The screening test for drugs are cheap and less time consuming. But the drawback of this test is not precise as confirmatory test. For detection of drugs in urine, there is two screening methods such as immunoassay and chromatography. Urine samples
Abstract Pigments extracted from different greens have different polarities and may be different colors. Mixed pigments can be separated using chromatography paper. Chromatography paper is able to separate mixed pigments due to their polarity and solubility. Pigments of chlorophyll a, chlorophyll b and beta carotene will be separated on chromatography paper because each has its own polarity and solubility, which results in different distance traveled up the paper. Beta carotene is non-polar so it
COLUMN AND THIN LAYER CHROMATOGRAPHY Mark Paul P. Pastrana, Mariah Ericka M. Patawaran, Princess Juneire M. Peligro, Francisco Q. Pua III, Rose Anne L. Quyo and Janille P. Ragpa Group 8 2B Medical Technology Organic Chemistry Laboratory ABSTRACT The main objectives were to separate the colored components of malunggay leaves by means of column chromatography, as well as to determine the purity of the components using thin layer chromatography (TLC) and measure the Rf values of the colored
loops over, bland, naturally colored cereal. Chromatography is the term for the laboratory techniques used in the separation of mixtures. The mixture is dissolved in a fluid, which is called the mobile phase. The mobile phase carries the mixture through a structure holding another material, which is called the stationary phase. The various components of the mixture travel at different speeds, which causes them to separate. Chromatography is technique generally used for chemical analysis in scientific
Thin Layer Chromatography I. Introduction Column chromatography is a technique used to separate non-volatile mixtures. A sub-class to column chromatography is thin layer chromatography. Thin layer Chromatography is usually being used to separate compounds by the distribution between two phases. The two phases are mobile and stationary phase. It is usually performed on a sheet of glass coated with a thin layer of adsorbent silica named TLC plate. This layer of adsorbent is known as the stationary
Chromatography Investigation Chromatography is a highly regarded technique used to separate the components of a mixture. It is based on the principle that each component possesses a unique affinity for a stationary phase and a mobile phase. The components that are more inclined to enter the mobile phase will migrate further on the chromatogram and distinguish themselves from the other components. The type of solvent used in chromatography is known to directly affect
COLUMN AND THIN LAYER CHROMATOGRAPHY Maria Janine B. Abarientos, Kuia B. Allarde, Aliana Keshia P. Andino Mary Viadelle E. Andrada and Nina Marian Robelea G. Ang Group 1 2C Pharmacy Organic Chemistry Laboratory ABSTRACT In this experiment, the techniques column and thin layer chromatography was used to separate and determine the purity of the colored components of siling labuyo and malunggay leaves. The results obtained relied on differential solubilities and adsorptivities of the components to
comparative analysis, forensic paint analyses and vehicle identifications (Remy. J). Furthermore, although it has not been presented often, the process of pyrolysis is not new or current. The principals were primarily discovered in 1958 at Bell Laboratories in the United States (Corp. B). The appropriate term for Pyrolysis is “Pyrolytic Gasification”, which literally means, the chemical change caused by the heat of molecular breakdown, or degradation of chemical materials. Some of the first products