AN037: Detection of Coconut Water Adulteration with CM-CRDS

AN037: Detection of Coconut Water Adulteration with CM-CRDS

In this note, we present the application of the Picarro Combustion Module Cavity Ring-Down Spectroscopy (CM-CRDS) System as a low-cost, easy-to-use, accurate, and precise solution to identify the addition of C4 sugars (adulteration), based on the carbon isotopic (δ13C) composition of the coconut water.

Abstract: 

The production, sale, and distribution of coconut water is a multibillion-dollar global industry with beverage products from over 30 different companies. Given the increase in preference and consumption of pure ‘organic’ products, the coconut water industry is challenged to ensure product purity and maintain customer confidence. This requires controlling supply chain quality, certifying the grade of coconut water, and complying with customs regulations. Essential to this process are evaluations of authenticity (i.e., the absolute ability to distinguish between ‘pure’ products with no added sugars and ‘adulterated’ products that have added sugar). In this note, we present the application of the Picarro Combustion Module Cavity Ring-Down Spectroscopy (CM-CRDS) System as a low-cost, easy-to-use, accurate, and precise solution to identify the addition of C4 sugars (adulteration), based on the carbon isotopic (δ13C) composition of the coconut water. It is easier to use and a significantly lower capital and total-ownership cost alternative to Isotope Ratio Mass Spectrometry (IRMS), and it produces results that are indistinguishable. The CM-CRDS system is simple to install, easy to operate, and does not require sample pre-treatment. This application demonstrates that the Picarro CM-CRDS is a powerful analytical platform in the food and beverage adulteration market. It can easily distinguish down to ~5% adulteration of coconut water by the addition of C4 sugars, with excellent precision (about ±0.3 per mil) and accuracy.