English 
A fresh coconut costs over a dozen yuan, yet a 1-liter pack of "100% coconut water" sells for only 9.9 yuan — at this price, can you really buy something purely natural?
The Beijing News recently conducted a test: they sent four top-selling "100% coconut water" products to an authoritative European institution for testing. The results were surprising — despite the ingredient lists explicitly stating only "coconut water," all of them were found to contain added exogenous water or exogenous sugars.
Currently, there is no unified standard for identifying coconut water, and the group standard T/CNLI 001-2025 Coconut Water does not contain relevant content either. Apart from water, natural coconut water mainly consists of sugars (2%-5%) and mineral elements (0.4%-1%). The ratio between these sugars is fixed. Much like a human fingerprint, it has its own unique "sugar profile." Once exogenous sugar is added, this natural balance is disrupted. Examining the natural composition and proportions of these major components helps in sourcing and cracking down on counterfeits.
A sharp eye for spotting fake coconut water
The combination of an Ion Chromatography system and Pulsed Amperometric Detection (IC-PAD) is globally recognized as the "gold standard" for carbohydrate analysis, providing a sharp eye to spot fake coconut water. Prin-Cen’s IC-50 series delivers several core advantages in this application:
Broad Scope: Enables the separation and detection of monosaccharides, disaccharides, polysaccharides, sugar alcohols, sugar amines, and various sugar derivatives (e.g., sialic acid) in a single injection to generate comprehensive carbohydrate profiles.
High Selectivity: Accurate sugar determination is unaffected by common interferents such as organic acids and sugar alcohols.
Exceptional Sensitivity: Hundreds of times more sensitive than traditional HPLC detectors, accurately capturing even trace amounts of sugars.
Streamlined Workflow: Eliminates tedious derivatization steps; direct injection saves both time and labor.
Utilizing Prin-Cen’s ion chromatography system and rapid carbohydrate separation column, sugar alcohols, monosaccharides, disaccharides, and oligosaccharides (up to DP20) can be separated within 30 minutes to form a complete sugar profile. For total sugar content analysis in food products alone, the runtime is further reduced to just 20 minutes.
Applying this advanced method, Prin-Cen’s lab compared the sugar profiles of natural coconut water (from both young green coconuts and mature coconuts) with four store-bought brands. The findings revealed that some commercial coconut waters were indeed adulterated or not 100% pure.
In authentic coconut water, the sugar composition is dominated by sorbitol, glucose, fructose, and sucrose. Meanwhile, oligosaccharides and polysaccharides with longer retention times than maltose are barely detectable, usually staying below 100 mg/L (remaining at trace levels in young coconuts, and even lower in mature ones). This means that in a pure, natural coconut water profile, you will almost never see a noticeable oligosaccharide peak.
Using the IC-50 system, Prin-Cen’s laboratory compared the carbohydrate profiles of natural young coconuts, mature coconuts, and commercial products, yielding startling results. The profiles of two best-selling brands revealed additional oligosaccharide peak clusters following the maltose peak (indicated in the chromatogram below)—peaks that are completely absent in natural coconut water. This provides smoking-gun evidence of added exogenous sugars!
The IC-50 does more than just verify the authenticity of coconut water; it serves as a powerful instrument for authenticity testing across a wide range of pure, natural plant-based beverages and food products. Today, numerous leading testing institutions both in China and internationally have adopted Prin-Cen’s IC-50 solutions, partnering with us to safeguard global food safety.
The IC-50 is a flagship masterpiece from Guangzhou Prin-Cen Scientific Co., Ltd. Featuring exceptional performance, versatile functionality, and comprehensive service support, it excels not only in analyzing various beverages but also in detecting carbohydrates across a wide range of food matrices and environmental samples. For more information and technical materials, please contact Guangzhou Prin-Cen Scientific Co., Ltd.
