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  1. Unanswered How to test AS’s for heavy metals and other impurities?

    I cannot find on web any chemical/analytical method or reagent for testing AS purity in terms of heavy metals.

  2. Unanswered How to spot a fake product?

    • How reliable is the QR code system? • Is there any chance a product may be fake even if it passes on QR checking? • Ampoules? Vessels? Which one is more reliable (if there’s any difference at all)? Which are the main features u look at while trying to check if a product is fake or not...
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