Is that not still not really dead accurate though? dee
On 11 Sep 2009, at 17:38, Marshall Dudley wrote:
Melly Bag wrote:What is the best gadget to measure PPM? MellyDepends on what you mean by best. Cheapest, or what produces the best results. The best results are obtained using atomic absorption spectrometry, and next best would be a photo spectrometer with the proper digestion and preprocessing of the product. The first I think runs about $50,000 and the second about $5,000.Marshall-
