How to choose a solvent (elutant) for TLCChoosing a right elutant (or elutant mixture) to obtain an useful TLC requires some trial and error. Usually a TLC is informative enough if the lower spot has Rf > 0.1 while the top spot exhibits Rf < 0.85....
Explain how the addition of a solute affects the boiling point of a solvent? Explain how thin-layer chromatography (TLC) works. In a TLC experiment, how to determine which R_f values for the spots are in the best solvent? Explain how the addition of a solute affects ...
You can always use a trusty broom for this step, but if you want to make things easier with a vacuum, there are some features you need to consider:Try to choose a vacuum without a beater brush to avoid scratching the rubber floor. If you have no alternative, a soft beater brush is ...
Why is it a problem to have the spotting line on a TLC plate below the solvent level in the developing chamber? In a TLC experiment, how to determine which R_f values for the spots are in the best solvent? 1. What would be the result...
This helps to seal the wall and provides a good base for whatever finish you choose next. It's like giving your walls a fresh start. Check for Dampness If you notice any damp spots, it's important to address them before moving on. Dampness can lead to mold, and nobody wants that. ...
How to clean a faux leather couch and other items The following steps work forcleaning faux leather itemsfrom sofas to bags and belts to shoes. 1 For general maintenance, give your sofa a regular wipe down using a cloth dipped in warm water. ...
When your sealer is intact, you actually remove stains from it and not the concrete itself. You'll need to choose a mild cleanser or detergent that won't discolor or mar the sealant. If the stain has penetrated the concrete itself, it may be necessary to sand the stain away and then ...
Start by cleaning your floors thoroughly, removing any furniture, and masking baseboards and cupboards with tape and plastic to protect against splashes. Choose a commercial wax-stripping product that's appropriate for your flooring and dilute it according to the manufacturer's instructions. Make a ...
tough spots by scrubbing with dish soap, some wax deposits call for something extra. Water-based cleaners aren't strong enough to dissolve thick deposits of wax, especially if they have been ground into the finish by foot traffic. For these stubborn spots, you may need a stronger solvent. ...
As an example we'll use the United Chemi-con cap above. Since the spec is 115 uA, it would be convenient to choose the resistor such that 100 uA gives a 1 VDC voltage drop. 10 kohms (1 / 100E-6) fills the bill. Since the typical DVM has a 10 megohm input impedance, we don...