In today’s market, the similarity between genuine and counterfeit polyacrylamide (PAM) products can make it challenging to discern authenticity. Here’s a guide to help you identify real PAM and avoid counterfeit goods:
Premix Method: This technique, often employed by manufacturers, involves incorporating fillers to mimic the appearance of genuine PAM. The primary challenge with this method is its subtlety, which makes it hard to detect without specialized equipment. For an effective check, measure the intrinsic viscosity and calculate the average molecular weight. Authentic PAM usually has a consistent molecular weight that aligns with its specifications. Counterfeits may have added fillers that distort these measurements, resulting in discrepancies.
Post-Mixing Method: Distributors sometimes use this approach by mixing PAM with inorganic salts to alter its properties. This method is more detectable and can be identified using several tests. Authentic PAM should have uniform properties and performance. Counterfeit products may exhibit inconsistent behavior due to the presence of these additives.
To ensure you are using genuine polyacrylamide, perform the following tests:
Visual Inspection: Genuine PAM typically appears as a white or off-white powder or gel. Any unusual color or texture could indicate counterfeit products.
Solubility Test: Dissolve a sample in water. Authentic PAM should dissolve completely to form a clear solution.
Molecular Weight Analysis: Use methods like gel permeation chromatography (GPC) to verify that the molecular weight matches the product specifications.
Infrared Spectroscopy (FTIR): This technique can identify characteristic functional groups in PAM, confirming its authenticity.
By employing these methods, you can effectively distinguish between real and fake polyacrylamide, ensuring you make informed purchasing decisions and achieve optimal performance in your applications.
