Metal preserved organics

Undergoes typical reactions of an organic acid, e.g. with alkalis or heavy metals. Preservative activity may be reduced by interaction with kaolin. ... 

To appreciate the different methods available for sample preservation for metals and organics. 

Wood preservative compositions can be most easily distinguished based on either the presence of heavy metals in the formulation, such as copper, zinc and tin, or their absence in metal-free (organic) formulations. This applies equally to both fungicide and insecticide based compositions. Many authors also consider Tar Oil preservatives such as creosote as a separate class of compounds. However, for consistency, these are discussed under organic wood preservatives in the following sections. 

BIOBAN N-95 Preservative is a 50% aqueous solution of non-metal lie organic compounds which is effective for the prevention of deterioration and spoilage of metalworking fluids. 

Product A non-metal lie, organic chemical, COSAN S is a highly effective anti-microbial preservative for water systems including adhesives, dispersed colors, protein colloids, and resin emulsions. 

Boron, as barium metaborate, is marketed as a mildew preventative for paints (273). Borax is used as a wood preservative, and an organic boron, 2,2 -(l-methyltrimethylenedioxy)-bis(4,4,6-trimethyl)-l,3,2-dioxaborinane (Biobor JF) [14697-50-80] is a biocide for jet fuel (274). Whereas tin metal is used to coat steel cans used as food containers, organic tin in the form of tributyl tin compounds have proven to be powerfiil antimicrobials, and have found use in antifouHng coatings for ship bottoms, paints, and wood preservatives (275). 

Wooden racks used in sea-water tests are likely to be subject to severe damage by marine borers. The wood used, therefore, must be treated with an effective preservative, for example creosote applied under pressure, if the test is to extend for several years. Organic copper compound preservatives may suffice for shorter tests, for example 2 or 3 years. Since the leaching of such preservatives may have some effects on corrosion, metal racks fitted with porcelain or plastics insulators have an advantage over wooden racks. 

In addition to the need for an adequate method for free cyanide and an adequate sample preservation method, a methodology should be developed for the differentiation of species, especially between free (HCN and CM ), metallic complexes, and organic complexes. 

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