Determination of the rate law was historically accomplished by monitoring the concentration of a reactant during a reaction through gravimetric analysis, but today it is almost exclusively done through fast and unambiguous spectroscopic techniques.
Penentuan hukum laju secara historis dilakukan dengan memantau konsentrasi reaktan selama reaksi melalui analisis gravimetri, namun sekarang hampir secara eksklusif dilakukan melalui teknik spektroskopi yang cepat dan tidak ambigu.