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Published on Nov 22, 2015
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PRESENTATION OUTLINE
THE PURPOSE OF THIS LAB IS TO DEVELOP A KIT TO TEST FOODS FOR SUGAR, STARCH, PROTEIN, AND LIPIDS
INDICATOR- CHEMICAL SUBSTANCE THAT REACT IN A CERTAIN WAY WHEN A PARTICULAR SUBSTANCE IS PRESENT. STANDARD- A POSITIVE TEST FOR A KNOWN SUBSTANCE.
Photo by Jeff Hester
BENEDICT'S TEST
If Bendict's solution is added to glucose, then the glucose will change colors because Benedict's solution did detect the presence of glucose
POSITIVE
THE TEST TUBE WITH GLUCOSE TURNED AN ORANGE-ISH COLOR WHEN BENEDICT'S SOLUTION WAS ADDED AND HEATED.
LUGOLS IODINE TEST
IF LUGOL'S IODINE SOLUTION IS ADDED TO STARCH, THEN THE STARCH WILL CHANGE COLORS BECAUSE THE LUGOLS IODINE SOLUTION DID DETECT THE PRESENCE OF STARCH
POSITIVE
TEST TUBE #4, WHICH HAD STARCH, CHANGED TO A BLACK COLOR WHEN LUGOLS SOLUTION WAS ADDED.
BIURET'S TEST
IF BIURET'S SOLUTION IS ADDED TO PROTEIN, THEN THE PROTEIN WILL CHANGE COLORS BECAUSE THE BIURET'S SOLUTION DID DETECT THE PRESENCE OF PROTEINS
POSITIVE
THE ALBUMIN PROTEIN TURNED TO A DARK PURPLE WHEN BIURET'S SOLUTION WAS ADDED.
LIPIDS TEST
IF A DROP OF LIPID IS PLACED ON BROWN PAPER, THEN THE LIPID WILL LEAVE AN OILY SPOT BECAUE BROWN PAPER SIS INDICATE THE PRESENCE OF A LIPID.
AFTER 15 MINUTES, THE OILY SPOT EXPANDED AND HAD NOT COMPLETELY SOAKED UP UNLIKE THE WATER.
CONCLUSIONS:
MY DATA DID SUPPORT MY HYPOTHESIS BECAUSE WHEN I USED A SPECIFIC SOLUTION, THE NUTRIENTS I WAS LOOKING FOR WE'RE POSITIVE.
Photo by afagen
RESOURCE SLIDE:
IDENTIFYING FOOD NUTRIENTS LAB PAPER
