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Make the acid HNO3 and HCl templates by breaking characteristics in microwave. Sample measurement method by method of atomic absorption spectrum of air-acetylene flame, measure the absorbance at a wavelength of 324.7 nmComposition analysis of species: taxonomic groups of invertebrate animals benthos. Analysis of the density: the density of animal groups according to each floor monitoring locations and in batches to the survey as a basis for assessing the volatility of the number of biomes animals bottomsComposition analysis of species: animal body Anatomy, floating under the magnifying glass in the famous soi 30-40 times magnification, observe and study the classification taxon on optical microscopy with different magnification (40-400 times). Analysis of density: the density of the floating animals are counting the number of individuals of each species or each group of samples on the count of 10 ml capacity Bogorov Chamber and out the conversion unit m3
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