It takes too long for a doctor to perform during a patients consultation. Also the results could be inaccurate if there were any substances left in the test tubes.
Qualitative observation is subjective. Quantitative observation is the result of controlled testing procedures with prescribed procedures in place. Quantitative testing is sometimes called empirical testing.
Meausring them!
There's reaaly no disadvantages. Go get 'em!
Yes, litmus testing is qualitative. It determines whether a solution is acidic or basic based on color changes of litmus paper—red for acids and blue for bases. While it indicates the presence of acidity or alkalinity, it does not provide precise pH values.
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Isokinetic testing is within the constraints of the machine. Isoinertial testing more closely mimics real life activity.
Testing magnesium and sulfate by qualitative analytical chemistry methods.
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It's probably similar to the difference between qualitative and quantitative analysis. Qualitative analysis (and research) looks at what is there, quantitative analysis (an presumably research) actually measures how much is there. Since all modern science is based on exeriment (and measurement), I'm not sure how you can do realistic qualitative research.
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qualitative