Biological detection subject matter

This book has been divided into three areas chemical detection, biological detection, and decontamination. The subject matter in the chapters include cross-linked divinyl benzene-substituted methacrylate polymers (Chapter 2), porous silicon (Chapter 3), reactive glass surfaces (Chapter 4), polycarbosilanes (Chapter 5), non-aqueous, chemically cross-linked polybutadiene gels (Chapter 6), conducting polyaniline nanofibers (Chapter 7), organically doped polystyrene and polyvinyltoluene (Chapter 8), electroplated polymer cast resins (Chapter 9), self assembled monolayers (Chapter 10), amphiphilic functionalized norbomene polymers (Chapter 11), transition metal substituted polyoxometalates (POMs) (Chapter 12), cross-linked divinyl-benzamide phospholipids (Chapter 13), and silica and organo silyl polymers (Chapter 14). 

For the determination of arsenic in biological material approx. 300 mg of dried matter was sealed in ultraclean silica vials, irradiated at a thermal neutron flux of approximately 9x1 o n cm sec . After irradiation the vials were washed with concentrated nitric acid, frozen in liquid nitrogen to reduce the internal pressure and crushed in a plastic container. The samples were then decomposed under pressure with a mixture of concentrated nitric and sulphuric acid, evaporated to near dryness after opening the vessels, taken up in hydrochloric acidic solution, made up to volume and after reduction with Kl subjected to an arsine generation step. The evolved arsines were trapped, the trap sealed into a polyethene vessel and the 560 keV gamma photopeak from As counted. The authors reported absolute detection limits of either 0.5 fig or 0.05 fig depending on the detector used (Orvini and Delfanti, 1979)... 

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