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Online Catalogue |  Diagnostics |  Urinalysis Reagent Strips |  D619 Combur 10 Test Box of 100 Teststrips


D619 Combur 10 Test Box of 100 Teststrips 		D619 Combur 10 Test Box of 100 Teststrips

D619 Combur 10 Test Box of 100 Teststrips For Testing Specific Gravity; pH; Leukocytes; Nitrite; Protein; Glucose; Ketone bodies; Urobilinogen; Bilirubin and Blood Combur-Test® strips from Roche Diagnostics Near Patient Testing are the culmination of years of targeted research and development Their unique design and the thought-out technology ensure a maximum of reliability and convenience Evaluation of results is always clear and reliable, thanks to the easy-to-read, vertical color scale on the vial label, which perfectly matches reaction colors on the test strip patches.
The benefits at a glance
Reliable diagnosis - Even minute pathological changes in the urine cause distinct color changes in the test fields. This makes urine testing with Combur-Test® strips the first step on the way to a reliable diagnosis in both clinics and practices.
High sensitivity - Thanks to the low detection limit of Combur-Test® strips even slight pathological changes in the urine are made visible.
Resistance to ascorbic acid - Combur-Test® strips are protected by iodate against ascorbic acid interference with both glucose and hemoglobin determinations eliminating virtually false-negative results and the need to recollect and retest specimens.
Economic efficiency - Combur-Test® strips can be stored at room temperature up to 2 years. The integrated desiccant in the stopper cap minimizes costly reagent waste.
Maximum reading convenience - Combur-Test® strips allow to simultaneously read all reagent pads between 1 and 2 minutes while the long strip handle keeps fingers clear of the specimen. Test principles
Specific Gravity:
The test detects the ion concentration of the urine. In the presence of cations,
protons are released by a complexing agent and produce a color change in the
indicator bromthymol blue from blue via blue-green to yellow.
pH:
The test is specific for the detection of hydronium ions, the pH being the negative
common logarithm of the hydronium ion concentration. The test pad contains the
indicators methyl red, phenolphthalein and bromthymol blue.
Leukocytes:
The reaction detects the presence of esterases that occur in granulocytes. These
enzymes cleave an indoxyl ester, and the indoxyl so liberated reacts with a
diazonium salt to produce a violet dye. Both intact and lysed leukocytes are detected.
Nitrite:
The most common organisms causing urinary tract infections, E. coli, and most
urinary pathogens, convert dietary nitrate to nitrite, which produces a pink coloration
of the test area. The reaction thus indirectly detects the presence of nitrite-forming
organisms in the urine. The test is based on the principle of Griess‘ test and is
specific for nitrite.
Protein:
The test is based on the principle of the protein error of pH indicators and is
particularly sensitive to albumin. Quinine, quinidine, chloroquine and tolbutamide do
not affect the test, nor does a high pH (up to pH 9).
Glucose:
The determination of glucose is based on the specific glucoseoxidase/ peroxidase
reaction.
Individual test areas
Test principles
Ketone bodies: This test is based on the principle of Legal‘s test and is more
sensitive to acetoacetic acid than to acetone. Phenylketones and phthalein
compounds produce red colors on the test area. These are, however, quite different
from the violet colors produced by ketone bodies. Captopril, mesna (2-
mercaptoethanesulfonic acid sodium salt) and other substances containing sulfhydryl
groups may produce false-positive results.
Urobilinogen:
A stable diazonium salt reacts almost immediately with urobilinogen to give a red azo
dye. The test is specific for urobilinogen and is not susceptible to the interfering
factors known to affect Ehrlich‘s test.
Bilirubin:
The test for bilirubin is based on the coupling of bilirubin with a diazonium salt to give
an azo dye.
Blood:
Hemoglobin and myoglobin catalyse the oxidation of the indicator by an organic H2O2
contained in the test paper. Combur-Test® strips distinguish erythrocytes from
hemoglobin with separate color scales, permitting differential diagnosis of hematuria
and hemoglobinuria. Furthermore, its high practical detection limit allows early
detection of hematuria and hemoglobinuria.


Code: D619













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Online Catalogue |  Diagnostics |  Urinalysis Reagent Strips |  D619 Combur 10 Test Box of 100 Teststrips