TRUMAN CHEMLAB ARCHIVE

Shallow pan (a brownie pan would work well)ġ. Green leaves (make sure they haven’t changed colors and aren’t too dry)ġ0. Use chromatography to separate the pigments and find their “true” colors.ġ. You can even use chromatography to predict the colors that leaves will change in the fall! Just like black markers have more than one color, leaves have more than one pigment. Compare the Rf and range of colors to identify the mystery mark! Next, go through the same process with all three markers. Now, it’s your job to solve which marker your friend used! First, go through the chromatography process (above) with the mystery mark. Have a friend select one of the three black markers and draw a line on a strip of paper towel, just as you did before. Try using different colors and compare the results! Each component may have slightly different properties, which is what allows them to flow at different rates or travel varying distances from the original starting point. The spread of the water helps separate the different components that make up the mixture. Because of cohesion within liquid molecules, and adhesion between the liquid and the solid, capillary action allows liquids to move against the forces of gravity. The solvent (mobile) travels through the paper (stationary) using capillary action.Ĭapillary Action is what causes the water to “climb” up your paper. In paper chromatography, the stationary phase is a strip of paper, and the mobile phase is a solvent. There are four different types of chromatography, but today, we will be focusing on paper chromatography. The stationary phase is the component that DOES NOT move, and the mobile phase is the component that DOES move. The separation is completed by passing the mixture through a solution using a medium.Ĭhromatography includes a stationary phase and a mobile phase. Another example of separating a mixture using chromatography would be separating common table salt, NaCl, into Sodium (Na) and Chlorine (Cl). For example, investigators sometimes use chromatography to identify unknown substances at crimes scenes. Why would we want to separate components of a material in the first place? Chromatography allows us to view the individual parts of a mixture, thus making it easier to analyze. Chromatography allows us to separate those substances. Sometimes a mixture appears homogenous, but is actually made up of several different substances. In addition, the shelves have a “soft start – soft stop” feature ensuring that the fragile materials being stored are protected from abrupt starts or stops.īy utilizing high-density we were able to save 50% of the space required using conventional stationary shelving.Chromatography is the separation of a material into its individual components. To improve safety, a powered high-density mobile system was used. That allowed for access without waiting for an aisle to be cleared. Using the 80/20 rule, the items accessed most often were placed in “sorter units” at the front of the rows. The items being stored required access by students. The chemistry department at Truman College in Chicago was losing one of its two storage rooms, and needed to combine all its supplies and materials into one space. Smarter Storage for Academic Institutions Truman College Chemistry Lab combined two storage rooms into one using high-density mobile storage. Special Archives, Film, & Media Preservation.Collection-Specific Cabinetry & Storage.

TRUMAN CHEMLAB ARCHIVE

Special Collections and Archive Storage.

Sterile Supply Storage for Healthcare & Pharma.

Truman chemlab