Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Urine preservatives - Specimen collection:
Urine preservatives: preservatives have different roles but are usually added to reduce bacterial action or chemical decomposition or to solubilize constituents that might otherwise precipitate out of solution. Another application is to decrease atmospheric oxidation of unstable compounds. Some specimens should have no preservative added because of possibility of interference with analytical methods. One of the most satisfactory forms of preservation of urine specimens is refrigeration immediately after collection. Urine preservative tablets contain many compounds that act on decreasing the pH of the urine or releasing of formaldehyde. Formalin is also used, but in large amounts it precipitate urea and inhibit certain reactions.
Acidification below pH 3 is widely used to preserve 24 hr urine specimens and is particularly useful for specimens for calcium, steroid, vanillylmandelic acid (VMA) determination (10 ml of HCl, 6 mol/L, per 24 hr excretion).
Sulfamic acid (10 g/L urine) is also used to educe pH. Boric acid ( 5 mg/30 ml) has been also used During acidification, precipitation of urates will occur, thereby rendering a specimen unsuitable for measurement of uric acid. Although thymol and chloroform were widely used in the past to preserve specimens for chemical and microscopic examination. Toluene is the only organic solvent that is still in use as a preservative. A mild base, such as sodium bicarbonate or small amount of NaOH, is used to preserve porphyrins, urobilinogen, and uric acid. When timed collection is complete, the specimen should be delivered without delay to the laboratory.
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Thermodynamics. Justify that it is the science to calculate energy, energy and entropy. Sol : Thermodynamics is science which deals with conversion of heat into mechanical e
Stea m Turbine: INTRODUCTIO N: Steam turbine is chief mover in which rotary motion can be obtained by a gradual change of momentum of steam. The force exerted on blade is
Evaluate the power output of turbine: Q: A turbine in steam power plant operating under steady state conditions receives the superheated steam at 3MPa and 350ºC at the rate o
what is the effect of a warm groove on the performance of the V belt
assignment help needed
what is resultant of coplanar non concurrent forces
dgdsgsfd sfdsvdsfsdf dsfsdgsgdsfsada sfdsfdsvsdfsd sgghdfgsgfa
Shear force and bending moment diagram: How can you draw a shear force and bending moment diagram. Sol.: In these diagrams, the Shear Force or bending moment are repr
You are an engineer for WhyShopHere Toys. You have been tasked with the following: Design a child's toy to provide food for fish in an aquarium. The toy should take the fo
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd