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Vacutainer tubes may contain additives designed to stabilize and preserve the specimen prior to analytical testing. Tubes are available with a safety-engineered stopper, with a variety of labeling options and draw volumes. The color of the top indicates the additives in the vial. [1] Vacutainer tubes were invented by Joseph Kleiner in 1949. [2]
This page was last edited on 28 November 2024, at 14:44 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The stopper of SPS (sodium polyanethol sulfonate) tubes have a paler yellow color, sometimes causing confusion; these are known as "yellow tops" not "gold". Trademarked versions of the SST include Covidien "Corvac" tubes.
Below in the order of draw generally required for the Evacuated Tube System (ETS) collection method are the most common tubes, listing additive and color: [10] [11] Vacutainer / sample tube types for venipuncture / phlebotomy edit
Freezer Storage Tips. Since it extends the life of perishable items by weeks to months, “freezer storage is an amazing way to reduce food waste,” explains Gangeri.
Color Today, the natural red hue that results from combining non-Dutched cocoa powder, acidic ingredients, and baking soda is typically enhanced by adding red food coloring to the cake's batter.
Soaking clothes in salt water to prevent color fading. The Good Housekeeping Institute Cleaning Lab has tested the theory that soaking clothes in salt water or vinegar can prevent color fading.
These tubes are commonly sealed with a rubber stopper and often have a specific additive placed in the tube with the stopper color indicating the additive. For example, a blue-top tube is a 5 ml test tube containing sodium citrate as an anticoagulant, used to collect blood for coagulation and glucose-6-phosphate dehydrogenase testing. [5]
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