Cromatografía de pigmentos fotosintéticos

Materials for Chromatography Practice

Introduction to Materials

• The materials required for the chromatography practice include:

• Green leaves (specifically spinach)

• A mortar and pestle

• Alcohol

• Filter paper

• A strainer

• A funnel

• A Petri dish

• A glass beaker

Initial Steps in the Experiment

• Four to five spinach leaves are placed into the mortar for crushing, initiating the extraction process.

Filtration Process

Preparing the Extract

• After filtering, alcohol mixed with pigments is prepared on a Petri dish.

• A piece of filter paper is then placed onto this mixture to absorb the pigments.

Identifying Photosynthetic Pigments

Results of Extraction

• The first objective of the experiment—extracting photosynthetic pigments—is achieved.

• Observations from the filter paper reveal distinct pigment layers:

• Chlorophyll A: Appears as a bluish-green layer.

• Chlorophyll B: Exhibits a yellowish-green hue, exclusive to higher plants and algae.

Understanding Pigment Distribution

Research Question Raised

• Additional observations include:

• Xanthophyll: Identified by its yellow color.

• Carotenoids: Noted for their orange coloration.

• An investigative question is posed regarding why these pigments appear in different regions on the filter paper, prompting further exploration into their distribution patterns.