Conductivity of a solution appears a very simple measurement. Probe goes in, number comes out. Simple? While a number certainly comes out whether that number has any meaning requires slightly more careful handling.
To measure the uncertainty associated with a set of results you need to repeat measurements.
Accuracy: how close to the “true” value you are (e.g. how close to your true weight your bathroom scales weigh you to).
Your data may not fit your pet idea, or even the generally accepted scientific theory, but that does not they are wrong.
Meausring the carbon content of soils, sediments and rocks is a key measurement in geochemistry and other related sciences.
Although aqueous hydrofluoric acid is not a strong acid, it is very useful. Unfortunately, it is also very dangerous.
BET is one of the few methods available for surface area measurement and has the advantage of being able to give a measure of porosity.
Calibration standards are key to the analytical process as they are used to create the calibration curve. Better the calibration standards the better calibration curves and so the better the results.
For most measurements in analytical chemistry some form of calibration curve is required. The better the calibration the more accuracy and precise are the results that you can achieve.
When you run an analysis there is a procedure you need to follow to ensure you get the best data.