Scientific Method Refers to a Lab Report

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Negative control is similarly established . Tetramethylbenzidine (TMB) is used as the positive control. Care should be taken to prevent contamination, duplication of tests should be conducted to verify reactive results.

Material Samples -- for the test, samples were used that could have the outward appearance of being blood and, by their color, containing hemoglobin. These included: Red Paint, Smashed Potato, Cooked Tomato Sauce, Red Food Coloring, Fresh Raw Beet, Actual Blood from test kit.

Results: The results for this test are presented in the table below: Table 1 -- Sample Test Reactions

Substance

KM

LCV

TMB

Result

Misc.

Red Paint

N

N

N

Not Blood

Potato

N

N

N

Not Blood

Cooked Tomato Sauce

FP

FP

FP

Not Blood

FP required retests

Red Food Coloring

N

N

N

Not Blood

Fresh, Raw Beef

FP

FP

FP

Blood Elements

FP required retests

Blood Sample

Pink

Purple

Green

Blood Present

REFERENCES

Cary, S. (2003).

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A Beginner's Guide to the Scientific Method. Wadsworth.

Schiro, G. (2011). "Collection and Preservation of Blood Evidence from Crime Scenes." Crime Scene Investigator Network. Cited….....

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