Red test tubes are typically used for the blood type Rh factor test.
This test is used to measure bilirubin in urine. The product of the reaction between bilirubin and a diazonium salt, in acidic medium is an azo dye, colored pink to violet, depending on the concentation.
If bacterium cannot use glucose the fermentation tube will stay the same color. Gas may also occur inside the fermentation tube.
You can use pH paper or indicator solution to test the pH of the contents in each test tube. If the test tube with acid turns the pH paper a different color or shows a lower pH value compared to the distilled water, then it contains acid.
Never put your face directly over the test tube. Use your hand to fan the air above the test tube toward you and smell that way.
A green tube is typically used for bilirubin testing.
gray
For testing bilirubin, a red stopper tube is typically used to indicate the presence of clot activator or gel separator. Additionally, no additives are required for testing bilirubin levels in serum or plasma samples.
A clear or colorless test tube is typically used when performing a sodium test to accurately observe the color changes in the solution. If a colored test tube is used, it may interfere with the interpretation of the results.
You can use a clear test tube for a lactic acid test. This allows you to easily observe any color changes that may occur during the test, indicating the presence of lactic acid.
A light blue tube is typically used for testing sodium (Na) levels.
A light blue tube is typically used for a prothrombin time (PT) test.
The color tube commonly used for a lab serum Vitamin D test is a red or gold-colored tube, which may contain a gel separator. It is important to consult the lab or healthcare provider for specific instructions on which tube to use for the test.
The recommended color tube for rubella serology testing is a red or tiger-top tube with gel separator. This allows for serum separation, which is needed for the test.
A red-top tube is typically used in phlebotomy for an RPR (Rapid Plasma Reagin) test.
The tube color commonly used for collecting blood for electrolyte testing is a green-top tube, which contains lithium heparin as an anticoagulant. The green-top tube helps preserve the integrity of the sample for accurate electrolyte measurements.
Red test tubes are typically used for the blood type Rh factor test.