| December 10 2012
The oxygen radical absorbance capacity (ORAC) assay is an analytical method to determine the antioxidant potential of nutraceutical, pharmaceutical and food ingredients. The ORAC assay relies on the fluorescent probe to monitor antioxidant activity, which can be read in 96-well microplates using a fluorescence-capable reader.
The oxygen radical absorbance capacity (ORAC) assay is an analytical method to determine the antioxidant potential of nutraceutical, pharmaceutical and food ingredients. The ORAC assay relies on the fluorescent probe to monitor antioxidant activity, which can be read in 96-well microplates using a fluorescence-capable reader.
Effective Cleaning of Pipettes Chemical, water or other analysis requiring exact measurement and dispensing of liquid reagents relies on the use of pipettes. Some pipettes are disposable, however, reusable glass pipettes are preferred because they are typically of higher quality and are calibrated more exactly. The main disadvantage of using glass pipettes is the difficulty of cleaning them between users.
The answer is simple: if you use your balance at all, regular calibration is critical. The question frequently comes up when a balance is initially purchased. A new balance operator’s manual almost always recommends calibration before use.
Solvent removal from solutions is commonly performed in laboratory and production processes. There are a number of different methods that can be used for solvent removal, including evaporation, vacuum concentration, lyophilization, reverse extraction, solute precipitation, and dialysis (solvent exchange).
With the expansion of the global nutraceutical market, the spotlight on the analysis of its raw materials is ever increasing. Testing of nutraceutical products for heavy metals like lead, arsenic, cadmium and mercury has gained utmost importance. Extremely low levels of these heavy metals like mercury, in nutraceuticals make its analysis challenging.
Rotational viscometers are the most widely used tool in today's QC labs for making viscosity measurements. Many small changes, like reduction in sample size and shortening the viscosity test time, can lead to significant increase in QC lab productivity.
While searching for that extra degree of safety in your laboratory or trying to remove fumes/gases from the laboratory environment NuAire has the proper canopy connections to exhaust your Class II, Type A2 Biological Safety Cabinet.
Increasing the sensitivity and resolution of LC/MS instruments has been an ongoing focus for instrument manufacturers. As a result of this increased sensitivity of today’s analytical instrumentation, the choice of high purity solvents can greatly influence the test results that are achieved.
Although gold nanoparticle production can be controlled to yield specific size ranges, both the concentration and size of nanoparticles must be checked following production. UV-Vis spectrophotometry is an established QC method for this; however cuvette spectrophotometers often require dilution of the nanoparticle solution before measuring, and volumes up to 3 mL.
This Application Note will demonstrate the extraction of 1,4-Dioxane from an aqueous matrix using Option 1 of EPA Method 522 for 500 mL initial volume sample. It will make use of the SmartPrep Cartridge Extraction System to produce a valid Initial Demonstration of Precision (IDP) and Initial Demonstration of Accuracy (IDA).
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