Nothing Special   »   [go: up one dir, main page]

Uric Acid: (Uricase / Pod Method)

Download as pdf or txt
Download as pdf or txt
You are on page 1of 1

URIC ACID

(URICASE / POD METHOD)


INTENDED USE:
This reagent kit is intended for the "in vitro" quantitative
determination of Uric Acid in serum / plasma / Urine.
Mix well and incubate at 37° C for 5 min. Measure the
CLINICAL SIGNIFICANCE: absorbance of the Standard (Abs.S), and Test (Abs.T)
Uric acid is the end product of the Purine metabolism. Uric acid is against the reagent blank at 505 nm.
excreted to a large degree by the kidneys and to smaller degree in
the intestinal tract by microbial degradation. Increased levels are CALCULATION :
found in Gout, arthritis, impaired renal functions, and starvation.
Decreased levels are found in wilson’s disease, Fanconis syndrome Abs. T
and yellow atrophy of the liver. Uric acid (mg/dl.) = x6
Abs. S
PRINCIPLE: NORMAL VALUE :
Uricase converts uric acid to allantoin and hydrogen peroxide. The Serum : Male : 4.0 - 7.2 mg /dl
hydrogen peroxide formed further reacts with a phenolic compound Female : 2.7 - 6.5 mg/dl
and 4 aminoantipyrine by the catalytic action of peroxidase to form a Urine : 250 - 750 mg/24 hrs
red coloured quinoneimine dye complex. Intensity of the colour Each Laboratory should establish it's own normal
formed is directly proprtional to the amount of uric acid present in the range representing its patient population.
sample.
LINEARITY :
REACTION:
Uricase This procedure is linear upto 20 mg/dl. If values exceed this
Uric Acid + H2O Allantoin + H 2O2 limit, dilute the serum with normal saline (NaCl 0.9%) and
repeat the assay.Multiply result by dilution factor.
Peroxidase
H2O 2+ 4 AAP + DHBS Red Quinoneimine + H2O QUALITY CONTROL :
For accuracy it is necessary to run known controls
with every assay.
CONTENTS:
Reagent 1 : Uric Acid Enzyme Reagent LIMITATION & PRECAUTIONS :
Reagent 2 : Uric Acid Standard 6 mg/dl 1. Storage conditions as mentioned on the kit to be adhered.
2.Do not freeze or expose the reagents to higher temperature
MATERIALS REQUIRED BUT NOT PROVIDED: as it may affect the performance of the kit.
- Clean & Dry Glassware. 3.Before the assay bring all the reagents to room
- Laboratory Glass Pipettes or Micropipettes & Tips. temperature
- Colorimeter or Bio-Chemistry Analyzer. 4. Incase of turbidity in urine, heat the sample for 10 minutes
at 60° C to dissolve any possible Urate precipitates.
SAMPLES: 5. Avoid contamination of the reagent during assay process.
Unhemolysed Serum, Heparinized/EDTA plasma, Urine. Dilute urine 6. Use clean glassware free from dust or debris.
(1:99) and multiply result by 100.
BIBLIOGRAPHY :
PREPARATION OF REAGENT & STABILITY : 1. Barham, D., and Trinder, P., Analyst 97, 142-145 (1972)
All reagents are ready to use and are stable till the expiry date 2. Fossati, P., Presscipe, L., and Bertr, G., Ciln. Chem.
mentioned on the label, when stored at 2 - 8 ° C.

GENERAL SYSTEM PARAMETERS: CODE NO. PACK SIZE Reagent 1 Reagent 2


Reaction type : End point S15C 5 x 20 ml 5 x 20 ml 3.0 ml
Wave Iength : 505 nm. (490-530nm)
S15D 4 x 50 ml 4 x 50 ml 3.0 ml
Temperature : 37°C
S15E 2 x 20 ml 2 x 20 ml 3.0 ml
Incubation : 5 minutes
Reagent volume : 1.0 ml.
Sample volume : 25 µl. IVD
Standard concentration : 6.0 mg/dl EC REP
UNIONPROJET S.R.L.S.
Via Aliprandi 41-20851 www.jas-anz.com.au/register

Lissone (MB) ISO 9001:2015


Zero setting : Reagent blank ISO 13485:2003

Light path : 1 cm

PROCEDURE :.
Pipette into clean dry test tubes labeled as Blank (B), Standard
(S) and Test (T) :

Addition Sequence B. S. T.
Enzyme reagent 1 ml 1 ml 1 ml
Standard - 25 µl -
Sample - - 25 µl

You might also like