Category: Lab techniques

The iodine-starch test, first discovered in 1814, is one of the most classic and visually striking chemical experiments in analytical chemistry. This test relies on a specific indicator to produce its famous color change, providing a precise signal for the presence of iodine in a solution.

Overconsumption of saturated fats can increase 'bad' LDL cholesterol, while unsaturated fats are beneficial for heart health. This health implication highlights why knowing how to tell if something is unsaturated or saturated is so important, a distinction rooted in fundamental chemical bonding.

Protein detection and quantification are central to a wide variety of biological processes, from basic research to clinical diagnostics. So, is there a way to measure protein levels? Indeed, there are numerous techniques, each suited for different applications depending on the sample type, desired specificity, and required sensitivity.

Over 95% of dietary lipids are triglycerides, which are oily or greasy substances that do not dissolve in water. A positive observation of lipids in a laboratory setting involves visible changes, such as the formation of a milky emulsion or the appearance of a translucent spot, that confirm the presence of these hydrophobic compounds.

According to laboratory equipment provider Biotage, a protein crash is a method favored by many clinical chemists for its cost-effectiveness in removing proteins that interfere with quantitative analysis. A protein crash is a widely used sample preparation technique in bioanalytical laboratories, referring to the rapid precipitation of proteins from a fluid sample.

The shelf life of a purified protein can vary dramatically, from a few days to over a year, depending on storage conditions. This variability is why understanding how long can proteins be stored is crucial for maintaining their structural integrity and function for research or therapeutic use.