Water Determination in Liquefied Petroleum Gas using GC BID and Ionic Liquid Column Watercol™

originally published in Supelco®'s Analytix Reporter Journal Issue 2 2018 by Merck KGaA, Darmstadt, Germany
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Water in petrochemical feedstocks can cause problems for processors. Freezing of pipe lines and valves and poisoning of expensive catalysts are just a few examples.

Monitoring water in petroleum from an upstream source to the downstream processing plant is critical to insure uninterrupted operation.

A new determination option by GC can bypass undesirable chemical interference effects from the petroleum to the “Sulfur interaction” that can skew results obtained by traditional water determination techniques. Shimadzu’s proprietary Barrier Ionization Discharge (BID) detector and Supelco’s water analysis column “Watercol” are combined to separate and measure the water in a formulation of feedstock (Figure 1) and provide a sensitive and accurate result (Table 1). Measurements can be made down to sub-ppm level of water detection.

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