ORDER
INFORMATION
| Catalog No: |
Product Description: |
Pack Size: |
| HM 1000 |
HEMOGLOBIN |
1 X 1000 ML |
| HM 5000 |
HEMOGLOBIN |
1 X 5000 ML |
METHOD
Colorimetric endpoint test
PRINCIPLE
In the cyanomethemoglobin method, erythrocytes are lysed by a stromatolytic
reagent in the presence of a surfactant and release their hemoglobin
into solution. Hemoglobin is oxidized to methemoglobin by ferricyanide,
and the methemoglobin is converted into the stable cyanomethemoglobin
by addition of KCN. The absorbance of cyanomethemoglobin is measured
at 540 nm and colour intensity is proportional to hemoglobin concentration.
SAMPLE:
Collect whole blood with EDTA using aseptic technique. Whole blood
collected with EDTA is stable for one week
at 2 - 8°C.
REFERENCE VALUES
| Adult Males |
13.0 - 18.0 g/dl |
| Adult Females |
11.0 - 16.0 g/dl |
| Children |
10.0 - 14.0 g/dl |
| Newborns |
14.0 - 23.0 g/dl |
REAGENTS
Reagent I : Cyanomethemoglobin reagent
Methemoglobin Std : 60 mg/dl (15 g/dl) store at 2-8°C
Interfering substances
Falsely elevated values are found in Lipaemic samples, Abnormal plasma
proteins etc. Numerous drugs exert an in vivo effect to decrease blood
hemoglobin.
REFERENCES
Eilers R.J., Am. J. Clin Path., 47 : 212 (1967).
Teitz N.W.,Fundamentals of clinical chemistry.
2nded.W.B.Saunders Co., Philadelphia p 411 (1976)
|
REAGENT PREPARATION
The Reagents are ready to use.
STABILITY : The stability is Till Expiry when stored at R.T. (away
from sunlight).
The standard is stable at 2 - 8°C.
AUTOMATED PARAMETERS
| Wave length |
540 nm |
| Cuvette |
1 cm light path |
| Reaction Temperature |
R.T. |
| Measurement |
Against reagent blank |
| Reaction Type |
End Point |
| Sample/Reagent Ratio |
1 : 250 |
| Incubation |
5 minutes |
| Low Normal |
10.0 g/dl |
| High Normal |
18.0 g/dl |
| Linearity |
20.0 g/dl |
MANUAL PROCEDURE
PIPETTE INTO TEST TUBE
| |
BLANK |
STD |
SAMPLE |
| Sample |
- |
- |
20 µl |
| Standard |
- |
20 µl |
- |
| Reagent |
5000 µl |
5000 µl |
5000 µl |
Mix well, Incubate at r.t. for 5 mins. Measure final
absorbance of the sample (Ac) and standard (As)
against the reagent blank. At 540 nm (520-550 nm)
CALCULATION AND LINEARITY
| Ac/As x Conc. Std.
= g/dl HEMOGLOBIN |
The hemoglobin assay shows a linearity upto 20 g/dl.
If the hemoglobin values are greater than 20 g/dl, dilute 1:1
with deionised water. Multiply result by 2. |