Given the following values, use the absorbance formula to find the hemoglobin concentration of the unknown. As =0.600 Au =0.300 Cs =20g/dl

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
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Given the following values, use the absorbance formula to find the
hemoglobin concentration of the unknown.

As =0.600
Au =0.300
Cs =20g/dl

5. Place the tube in a comparator block and add distilled water drop
by drop until it matches the Hb standard in the comparator block.
6. Read the meniscus directly on the gram scale of the tube.
GRAVIMETRIC Method:
Copper Sulfate Method
Principle
Specific gravity of the blood is largely determined by the amount of
hemoglobin it contains.
Materials
1. Copper sulfate reagent
2. Lancets
3. Cotton
4. Alcohol
Procedure
1. A single drop of patient's blood is placed in a solution of copper sulfate
with a specific gravity of 1.053 (Equivalent of density of blood with a
hemoglobin value of 12.5 g/dl)
2. Normal Test results occurs when drop of blood falls through the cop
sulfate solution without rising, indicating the blood has a >12.5 g/dl
hemoglobin level.
Precautions:
> Do not mouth pipet the Drabkin's reagent. It contains cyanide and is
poisonous.
Always use clean cuvettes.
Ensure that the dilution is made correctly.
Set the wavelength at 540nm.
> Mix the blood ten to twenty times before sampling.
> Do not squeeze the finger hard at the capillary puncture site.
ROUTINE Hematology LabORATORY
STUDENT MANUAL ; Volume 1
CALCULATIONS:
1 Given the following values, use the absorbance formula to find the
hemoglobin concentration of the unknown.
As =0.600
Au =0.300
Cs =20g/dl
2. Convert 12.8 g Hb into percent Hb
Transcribed Image Text:5. Place the tube in a comparator block and add distilled water drop by drop until it matches the Hb standard in the comparator block. 6. Read the meniscus directly on the gram scale of the tube. GRAVIMETRIC Method: Copper Sulfate Method Principle Specific gravity of the blood is largely determined by the amount of hemoglobin it contains. Materials 1. Copper sulfate reagent 2. Lancets 3. Cotton 4. Alcohol Procedure 1. A single drop of patient's blood is placed in a solution of copper sulfate with a specific gravity of 1.053 (Equivalent of density of blood with a hemoglobin value of 12.5 g/dl) 2. Normal Test results occurs when drop of blood falls through the cop sulfate solution without rising, indicating the blood has a >12.5 g/dl hemoglobin level. Precautions: > Do not mouth pipet the Drabkin's reagent. It contains cyanide and is poisonous. Always use clean cuvettes. Ensure that the dilution is made correctly. Set the wavelength at 540nm. > Mix the blood ten to twenty times before sampling. > Do not squeeze the finger hard at the capillary puncture site. ROUTINE Hematology LabORATORY STUDENT MANUAL ; Volume 1 CALCULATIONS: 1 Given the following values, use the absorbance formula to find the hemoglobin concentration of the unknown. As =0.600 Au =0.300 Cs =20g/dl 2. Convert 12.8 g Hb into percent Hb
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