Chemistry tests fall into two broad categories, routine also called general and immunochemistry. This article will address routine chemistry testing in a medical practice laboratory and the next installment in this series will cover immunochemistry testing. Routine chemistries encompass those tests that are measured by any of four methods:
Ionic compounds have higher melting points. This implies that the bonds between ionic compounds are quite strong and require high temperatures to break them.
Ionic and polar compounds are usually soluble in water. This is because water's partial charges are attracted to the charges in ionic compounds and the partial charges of polar compounds. Some ionic and polar compounds will not dissolve in water if they are large compounds or the bonds are too strong for water to pull apart.
Recall all of these precipitates in the previous lab did not dissolve in water even though they were ionic compounds. Polar compounds have much higher melting points than non-polar covalent compounds of the same size. Glycerin and propane have 3 carbon atoms each.
The OH groups on sucrose and glycerin allow for hydrogen bonding between the hydrogen atoms on one molecule and the oxygen atoms on the other molecule. This extra attraction requires higher temperature to overcome. Non-polar compounds are not soluble in water.
Earlier we examined the charges in methanol.
Below we will look at the charges of a another polar covalent compound, sucrose. Below is the structural formula for sucrose left image and a ball and stick model of sucrose right image.
Carbon, hydrogen, and oxygen are non-metals. When they combine, they use covalent bonds. Since oxygen pulls much harder on electrons than does carbon and hydrogen, the oxygen atoms will have a partial negative charge.
With electrons pulled slightly away from the hydrogen and carbon atoms, their protons will be more exposed. So hydrogen and carbon atoms attached to an oxygen atom will be slightly positive.
That line is like a pole with plus end and a minus end. That why these bonds are called "polar" bonds. The below left image shows the atoms of sucrose more of their actual size. This kind of model is not as useful as the ball and stick model above because it's hard to see all the atoms and how they are connected.
The spacefilled model does, however, more accurately show the shape of the whole molecule. The middle molecule is a map of the charges on sucrose.Vet Lab also integrates all diagnostic results into one single report, this helps us understand and find a solution to your livestock's needs.
We also utilize other high end labs and research centers for more specific lab testing needs. Processed Volume: 10 mL (Minimum: 3 mL) urine Note: Submission of the minimum volume results in an elevated reporting range and inability to repeat analysis. Collection: Routine urine collection, no preservative Special Processing: Lab Staff: Mix sample well, remove urine aliquot into a screw-top round bottom container.
Store and ship at refrigerated temperatures. Urine chemistry is a group of one or more tests done to check the chemical content of a urine sample.
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How the Test is Performed For this test, a clean catch (midstream) urine sample is needed. Urine Analysis Lab Report Objectives: To learn what tests can analyze a person’s urine and what they find Chem – 9 Test Specific Density Microscope Analysis of Urine To analyze a urine sample Examine presence of normal/abnormal elements Use urine sample to find specific gravity, pH, and chemical parts To have a better understanding of.
URIC ACID (UA), is a waste product excreted in urine. High values are characteristic of gout, but may be seen in ar-thritis, kidney disease, and massive breakdown of cells in the body. Signiﬁcantly high values should be evaluated by your physician, but low values are probably not of signiﬁcance.
A GUIDE TO LABORATORY REPORT WRITING 3 Introduction This Guide is designed to be used in preparing laboratory reports for all general science and engineering courses at IIT.