Evaluation Of The Practical -you Work As An Analyst For A Snack Food Manufacturer.you

The similarities between column and paper chromatography is that both have a stationary and mobile phase. The stationary phase in the paper chromatography is the paper, and in the column is the sodium bicarbonate. The mobile phase in the paper chromatography is the movement of the solvent, .3% NaCl, and the column is the different solutions added. Column chromatography is basically the same as paper chromatography, except that the dye solution would have to be added individually rather than being able to do it all at once, like it does when using chromatography

The stationary phase will absorb or slow down different components of the tested solution to different degrees creating layers as the components of the solution are separated. Chromatography was invented by the Russian botanist, Mikhail Tsvet. Chemists use this process to identify unknown substances by separating them into the different molecules that make them up.

1. Paper Chromatography is a method used for the separation of colors which are also referred to as colored chemicals/substances or pigments. This method is used for experiments, to identify coloring agents and to separate out a compound into its various components.

DNA analysis is a forensic tool that allows a suspect to be linked to a crime scene. Using the DNA analysis method, requires law enforcement officers to obtain DNA from the suspect and compare the suspects DNA,

and  ultimately  to  be  able  to  identify  an  unknown  substance  based  on  our  studies and  tests using the

Students took a forensics unit in their chemistry class and did all types of experiments that forensic scientists would do on a daily basis. They looked at the chemical and physical properties of blood. “Chemical students participating in this unit used a variety of forensic techniques including teeth impressions, fingerprinting, lip printing , chromatography paper, blood splatter projections, and chemical analysis” (Guzzetti 195). Chromatography paper, often used in chemistry experiments, is used to separate liquid mixtures, specifically homogenous mixtures. Homogeneous mixtures are mixtures that one could not see all parts of. Blood is a great example of a homogeneous mixture another one could be marker ink in water. The chromatography paper would separate the mixture by the ink going up the paper. In blood it will separate the different parts of the blood so one could look at the different parts of it. The students looked at more of the chemical properties of the blood as well. “The students were charged with observing the scene and collecting as much data as they could from blood splatters to fibers” (Guzzetti 196). The fibers of the blood show the chemical properties of the mixture. Forensic scientists have to look at the chemical properties of blood all the time. Without the chemistry behind looking at the different parts of the blood it would be much more difficult to analyze it. Chemistry and

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 travels the highest distance, followed by chlorophyll a. Chlorophyll b is the most polar; therefore, it travels the shortest distance. The separated pigments on the chromatography paper can be eluted in acetone and absorbance spectrum is

In thin-layer chromatography a liquid is pumped across a bed of particles. The liquid that is pumped across is called the mobile phase and the particles are the stationary phase. A mixture of the molecules that will be separated is put into the mobile phase. Thin-layer chromatography tells you/helps you determine the number of compounds in a mixture, the purity of a compound, and the identity of compounds if you have examples to pull information from. Thin-layer chromatography is used to separate nonvolatile mixtures. The dye that was the most polar was the color red and pink which was Rhodamine B and the least polar was the light pink color which was Sudan IV. Our first TLC plate had five

Known to be a very important tool in chemistry, its primary usage in quantitative and qualitative analysis of mixtures. Gas Chromatography can determine unknown volatile compounds through the means that it can separate organic compounds from a mixture (Linde

HAIR a sample of hair is remove direct from the head are from a hair brush. A single hair can tell the DNA of someone. Hair analysis can also pick up certain health issues.Hair is predominantly used to test for drugs such as amphetamines, cocaine, marijuana (THC) and heroin, and more recently tests have been created to determine if the deceased was drinking heavily in the last few months before death.

The main type of chromatography process is paper chromatography. Paper chromatography process was what we used for/during this lab. Paper chromatography is used to separate the components of ink, dyes, plant compounds (chlorophyll), make-up, and other substances. The other chromatography processes include: Liquid, Thin-Layer, and Gas. Liquid chromatography is used for identifying unknown plant pigments and other compounds.

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 and height. There are two different types of chromatography gas chromatography (GC) and liquid chromatography (LC or HPLC).

Chromatography is a separation technique that is used to separate the components of a mixture (BBC, 2014). Chromatography is used to identify chemicals or colours in food, ink, and dyes to name a few (BBC, 2014). Chromatography has a stationary phase and a mobile phase. The stationary phase doesn’t move and consists of a solid, or a liquid on a solid (University of California-Davis, 2013). The mobile phase moves up through the stationary phase and consists of a liquid or a gas (University of California-Davis, 2013).

There are four different kinds of chromatography, there is gas, paper, liquid, and thin-layer. Gas chromatography is mostly used to determine the chemical composition of the unknown substances. Thin-layer is used on thin plastic or glass trays to identify the composition of pigments and chemicals. Liquid is used to identify an unknown plant pigments and other compounds. Lastly, paper can be used to separate the components of inks and dyes. So in this essay i will talk about two real life cases that involve Gas and paper chromatography and

Some materials that appear homogenous are actually a mixture of different substances, one example being ink. To see what colors make up black ink, one can allow the substance to move across a fixed, absorbent material such as paper. This technique, called chromatography, is a forensic method of separating a mixture of chemicals into their individual components. Although the separation of colors is the most elementary application of chromatography, the process of a liquid or gas mixture moving over a stationary state of matter (liquid or solid) is a tool used by local and federal law enforcement to analyze and solve crimes.