Anonymous asked in HealthDiseases & ConditionsDiabetes · 1 decade ago

How do Glucose Strips Test Work? The colors indicating?

I know they change color according to the presence of glucose or not, but what are these colors? What is the color of the strip originally? What color does it turn in the presence of glucose? Please help me, it's for a Biology Report!

9 Answers

  • Anonymous
    1 decade ago
    Best Answer

    Urine glucose tests also do not indicate the current blood glucose level but rather the glucose level during the period of time between the collection of the urine and the previous urination. In many patients, the level of blood glucose must be very high in order for glucose to appear in the urine. Therefore, the urine may be free of glucose, but blood levels of glucose still may be unacceptably high. Thus, results from urine glucose tests should not be used to adjust insulin doses.

    There are two types of urine glucose tests. Both types rely on a chemical reaction that produces a color change. The tests uses either tablets or strips. Generally, the test strip or tablet is placed in urine. The resulting color change is matched against a color chart provided by the manufacturer which shows the different colors produced by different levels of glucose.

    The first type, called the copper reduction test, uses cupric sulfate (for example, Clinitest). In the presence of glucose, cupric sulfate, which is blue, changes to cuprous oxide, which is green to orange. The reaction should be observed closely and the manufacturer's instructions closely followed. The copper reduction tests can react with substances other than glucose in the urine and lead to false positive results, meaning the test shows glucose when it is not present. Examples of these other substances include aspirin, penicillin, isoniazid (Nydrazid, Laniazid), vitamin C, and cephalosporin–type antibiotics. Tablets and solutions utilizing copper reduction may damage the skin and are poisonous if ingested. They should be handled carefully and kept out of the reach of children.

    The second type of urine glucose test, called the glucose oxidase test, uses the chemical toluidine and the enzyme glucose oxidase (for example, Clinistix). Glucose oxidase converts the glucose in urine to gluconic acid and hydrogen peroxide. The interaction of the hydrogen peroxide with the toluidine causes a change in color. False negative results, meaning the test shows no glucose when glucose really is present, may occur in patients taking vitamin C, aspirin, iron supplements, levodopa (Sinemet), and tetracycline–type antibiotics. Glucose oxidase tests are more convenient to use and less expensive than copper reduction tests. The strips should be kept away from moisture.

    And now you know


  • 4 years ago


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    3 years ago


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  • 3 years ago

    Glucose Test Tape

  • Anna
    Lv 4
    4 years ago

    Most strips require a meter. The test strip is inserted into the meter, blood is applied to the test strip, and a reading is given. There's a lot more to determining if you have diabetes than pricking your finger and putting blood on a test strip. The readings mean different things depending on when they are taken. If you're concerned, ask your doctor for a blood test.

  • 1 decade ago

    Take a look at the following websites. They show you the range of colours [colors, if you're American] that the test strips will turn dependent on the amount of glucose that's present.

    The test pad (the part of the test strip where the sample of blood is dropped) starts out an 'off-white' colour [color].

    Best of luck to you.

  • 4 years ago

    Type 2 diabetes, usually referred to as adult onset, is when your body produces insulin but can not use it properly. This type can be treated successfully with the right diet and exercise in most circumstances. Read here

    If blood sugars are not kept under control at some point insulin will probably be integrated / oral medications are also available. People with diabetes can live long, happy lives but must be diligent in their care and make sure you see your endocrinologist on a regular basis.

  • 3 years ago

    Well, it depends..

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