WanCheng urine Specific Gravity test strip URS-4SG

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4.  urine Specific Gravity test strip   for sale fast result  5.  urine Specific Gravity test strip    for sale oem welcome A urine test strip is a basic diagnostic instrument used to determine pathological changes in the urine in standard urinalysis. A standard urine test strip may comprise of up to 12 different chemical pads or reagents which react (change color) when immersed in, and then removed from, a urine sample.   The test can be read between 60 and 120 seconds after dipping. Routine testing of the urine with multiparameter strips is the first step in the diagnosis of a wide range of diseases.   Wancheng urinalysis strips are very resistant to interference from ascorbic acid (vitamin C). Some strips on the market are prone to vitamin C interference and give falsely-lower or false-negative results. The tests that are most affected are blood, glucose, bilirubin and nitrite.   1) Easy to Use  2) Rapid Results: 30 seconds to 2 minutes 3) High Quality Color Chart: Superior European-produced color charts provide consistent, dependable readings 4) Flexible: Available in up to 12 parameters 5) Cost Effective: 25, 50, or 100 strips per bottle, with performance better than or equal to the current market leader at a much lower price  6) Consistent Quality with 2 Year Shelf Life   Urine Reagent Strip (URS-4SG)   Testing Items: Glucose SG Blood Protein         Strips Dimension:  90(L)      5±0.2(W)   0.24-0.26(T)  (mm)    Glucose   This test is based on a sequential enzyme reaction. First, glucose oxidase catalyzes the formation of gluconic acid and hydrogen peroxide from the oxidation of glucose. A second enzyme, peroxidase, catalyzes the reaction of hydrogen peroxide with potassium iodide chromogen to oxidize the chromogen to colors ranging from blue through greenish-brown, and brown to dark-brown.   Reactivity of the test decreases as the specific gravity and/or pH of urine increases, and may also vary with temperature. Ascorbic acid (more than 50 mg/dl) and ketone bodies (more than 40 mg/dl) may cause a false negative result for a specimen containing a small amount of glucose (100 mg/dl). However, the combinations of such ketone levels and low glucose levels are metabolically improbable.   Specific Gravity This test is based on the pka change of certain pretreated polyelectrolytes in relation to the ionic concentration. In the presence of an indicator, the color changes from deep blue in urine of low ionic concentration.   Elevated specific gravity readings may be obtained in the presence of moderate quantities (100- 700 mg/dl) of protein. Specific gravity is also increased with the glucose concentration in the urine and highly buffered alkaline urines may also cause low reading results.     PH   This test is based on the pseudoperoxidase activity of hemoglobin which catalyzes the reaction of 3,3'5,5'-tetramethylbenzidine and buffered organic peroxide, 2,5-dimethylhexane-2,5-dihydroperoxide. The resulting color ranges from, greenish-yellow through bluish-green to dark blue.   A false positive test result can sometimes occur when bacteria are present in the urine. Ascorbic acid or protein may reduce the reactivity of the blood test. Strong oxidizing substances such as hypochlorites may produce a false positive result. Urine from menstruating females often, but not always, yield positive results.   This test is slightly more sensitive to free hemoglobin and myoglobin than to intact erythrocytes. The test is generally capable of detecting 0.015-mg/dl free hemoglobin or 5 to 10 intact red blood cells per ml of urine. The sensitivity may he reduced in urine with high specific gravity and ascorbic acid content. The appearance of green spots on the reagent test area indicates the presence of intact erythrocytes in the urine.   Protein   This test is based on the color change of the indicator tetrabromophenol blue. A positive reaction is indicated by a color change from yellow through green and then to greenish-blue.   The minimum sensitivity of this test is 10 mg/dl of protein in urine. Highly buffered alkaline urines (pH 8.5) may give false negative results. The interpretation of results is also difficult in turbid urine specimens.     Visual Reading technique:                         We can supply un-cut sheet for competitive price, welcome to inquiry: