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Principle

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									LDL Cholesterol
Precipitation /Enzymatic method
Store at 2-8ºC



                  PRINCIPLE                             Mix well, incubate at 25ºC for 20 minutes or at 30ºC
LDL are precipitated by heparin at their isoelectric    for 12 minutes, or at 37ºC for 10 minutes, then read
point (pH 5.04) after centrifugation (HDL) and          the optical density (O.D). The color is stable for 30
(VLDL) remain in supernatant.                           minutes

           REFERENCE VALUES
                                                                       CALCULATION
                              mmol/l           mg/dl
                                                        LDL Cholesterol =
No treatment required             3.9           150     Total Cholesterol - O.D Sample x 11 x 50
                                                                             O.D Standard
Suspect range                 3.9-4.9         150-190
Treatment required                4.9           190     50 = standard concentration.
                                                        11 = dilution factor.
These ranges are given for orientation only, each
laboratory should establish its own normal ranges.
                                                                      PRESENTATION
                     SAMPLES                            1 X 50 ml         Cat No 0621        50 Tests
                                                        1 X 100 ml        Cat No 0622        100 Tests
Serum.
                     REAGENTS
R1 :
                                                                      BIBLIOGRAPHY

Heparin                      50.000          IU/L       - H. Wieland and D. Siedel . J. Lipid Res .
Sodium citrate               0.064           mol/L      24.904 (1983)
R2 :                                                     - G. Assmann, internist 20.559 (1979) .

Standard                     50               mg/dl

                 PROCEDURE
Sample                       100 l
Reagent                      1000 l

Mix well, allow to stand for 10 minutes at room
temperature and centrifuge at 5000 rpm for 10
minutes .
Determine the cholesterol concentration of
supernatant by using stander LDL cholesterol and
SYRBIO Kit for the determination of cholesterol.

                     Blank        Standard     Sample
Standard               -            50 l         -
supernatant            -              -         50 l
Reagent              1 ml           1 ml        1 ml




                                                                                                      1/2005

								
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