Quality Control of E-Liquids Using Boiling Point

The application gives the method to determine the boiling point of different commercial e-liquids (with and without nicotine) and propylene glycol for quality control purpose. The ambient pressure measured with a built-in calibrated pressure sensor, and compensation to sea-level pressure is automatically calculated and applied to the results.

Background

Recent alternatives to traditional cigarettes include vaporizers and e-cigarettes. These products contain e-liquids, flavored liquid mixtures that are vaporized and then inhaled by the user.

The popularity of e-cigarettes has led to public concern regarding the safety of such devices. Starting 2016 and 2017 respectively, regulations in the EU and the US require e-liquid manufacturers to submit a list of ingredients for their products, including CAS number and IUPAC names of each substance and quantities of potentially harmful chemicals and their effects.

The quality of e-liquid ingredients such as propylene glycol can be ensured by examining its physical characteristics, such as its boiling point (BP).  The BP is also used to determine the temperature to which an e-liquid mixture should be heated to induce vaporization (or boiling). Using the METTLER TOLEDO Melting Point Excellence System MP80, the BP of pure substances and mixtures can be measured fully automatically, allowing you to check the quality of your e-liquid solutions.

Download the application method for accurate temperature and heating rate control to perform BP of e-Liquids