Determination of trace arsenic in naphtha
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Dear fellow sailors, regarding the determination of arsenic at the ppb level in naphtha, I tried using the potassium-coulomb method as well as spectrophotometry, but neither method proved accurate. I checked some sources and found that the atomic fluorescence method could be used for this purpose, yet no relevant standards were available. If anyone has a better method or can recommend a good brand of equipment for atomic fluorescence analysis, I would be very grateful. Thank you!
Using the SH/T0629-1996 method for determining arsenic content in naphtha is relatively accurate, but sample preparation is a bit more complicated
The determination of trace arsenic in naphtha is generally an analysis item for reforming feedstocks. The analysis methods for arsenic are basically fine, but the sample preparation process is very troublesome. Sulfuric acid extraction is generally used for the oxidation and decomposition of organic arsenic to convert it into inorganic arsenic, which is then measured after reduction. The process of oxidative digestion requires careful and patient handling.
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