A method for determining ammonia content in electronic cigarette smoke liquid by ion chromatography

Abstract

The invention discloses a method for measuring ammonia content in electronic cigarette liquid by using ion chromatography. In this method, the e-cigarette liquid sample is extracted with an acid solution; if the sample is completely dissolved in the extract, the supernatant is filtered through a 0.45 μm aqueous microporous membrane; if the sample is in a suspension state, the extract is placed in a centrifuge tube , centrifuged at 10000r / min for 5min, and the clear liquid was filtered through a 0.45μm aqueous microporous membrane. After the above pretreatment is completed, the extract is introduced into an ion chromatograph for determination, and the external standard method is used for quantitative analysis. The operation of the invention is fast, simple and easy. The results show that ammonia has a good linear relationship in the linear range (R2≥0.999), the detection limit is 0.0350 μg / g, the quantification limit is 0.116 μg / g, and the recoveries of the three spiked levels are between 93.21% and 106.47%. , indicating that the method has high sensitivity, good repeatability and recovery.

Description

technical field [0001] The invention relates to the technical field of physical and chemical testing of electronic cigarette products, in particular to a method for measuring ammonia content in electronic cigarette liquid by using ion chromatography. Background technique [0002] E-cigarette is a portable electronic atomizer imitating cigarettes. Through the atomizer, the e-cigarette liquid is atomized and inhaled directly. The process is similar to smoking real cigarettes, but no smoke is produced during the process. The most important part of electronic cigarettes is electronic cigarette liquid, whose main components are propylene glycol, glycerin and water; at the same time, most of them contain tobacco plant extracts or other plant extracts, as well as some chemically synthesized flavors and fragrances. Through these components and Various additives achieve a taste similar to that of real cigarettes. Most e-cigarette liquids contain nicotine, but a small amount does not...

AI Technical Summary

Problems solved by technology

If the ammonia content is too low, the strength of the smoke will decrease and the fullness will not be enough; however, excessive ammonia will produce a strong irritant, causing the smoker's throat to constrict, making people feel coughing in the nose and tongue with an unbearable pungent feeling; Therefore, ammonia plays an important role in controlling cigarette smoking

However, there is no report on the determination of ammonia content in e-cigarette liquid

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