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There are so many ways to configure wireless hotspots; this article explains two very different ones. One is open source with unrestricted access; the other is done with vendor software and full authentication. You can get a taste of both strategies here and see which would satisfy your needs. [ABSTRACT FROM AUTHOR]

A simple method has been developed for the determination of dibutyl phthalate, di-(2-ethylhexyl) phthalate, diisodecyl phthalate, and di(2-ethylhexyl) adipate in industrial emissions. A cartridge packed with a modified silica gel is used as adsorbent and adsorbed compounds are eluted and analyzed by HPLC in normal and reversed phase system.

Possibilities of the determination of lower aliphatic amines by high performance liquid chromatography (HPLC) with fluorimetric detection after derivatization with o-phthaldialdehyde (OPA) and sample enrichment using solid-phase extraction were investigated. Various materials including octadecyl silica and strong and weak cation exchangers with organic matrices were compared as the sorbents for enrichment of aqueous samples of amines. The best results were achieved using the weak cation exchanger Spheron C 1000 as the sorbent and methanolic perchloric acid as the desorption liquid in the enrichment step. The recovery, linearity and detection limits of the method were determined. The concentration limits of determination of the amines are in the range of nmole.l-1, with the enrichment factor of 240 in the preconcentration step.