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162:. The color of the substance contained in a Nessler cylinder is visually compared with the model. The tubes often carry out a series of calibrations of solutions of increasing concentrations, which functions as a comparative scale. To minimize differences in the subjective impression of the color of the solution of the substance to be analyzed, cylinders of a series should have the same characteristics - height, diameter, and thickness of glass. Basically, there are four types of used cylinders:
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Witold
Hermanowicz, Vera Dożańska, John Dojlido, Bohdan Koziorowski: Physico-chemical examination of water and wastewater. New York: Arcade, 1976, pp 19–21. UKD 628.31:628.1.03:543.3.
192:, colorimetric assay methods using Nessler cylinders and visual assessment are used very rarely. However, Nessler cylinders are still used as reaction vessels, in the same way as
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with optically plane bottom. On the walls, there are marks of the nominal stroke volume (usually 100 ml) and possibly one halfway mark (usually 50 ml).
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high with a capacity of 100 ml (about 375 mm in height, approximately 24 mm in diameter)
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high with a capacity of 50 ml (about 300 mm in height, approximately 21 mm in diameter)
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low with a capacity of 50 ml (about 175 mm in height, approximately 25 mm in diameter)
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low capacity of 100 ml (about 210 mm in height, approximately 34 mm in diameter)
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However, these parameters (except volume) can vary significantly between two cylinders.
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Determination of iron by a colorimetric method, top view
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10-30cm long flat-bottomed laboratory tube made of glass
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Nessler cylinders with a capacity of 100 cc and 50 cc
185:differ in that they are scaled to full height.
57:but its sources remain unclear because it lacks
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188:Due to the spread of automated
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125:color comparison cylinders
129:color comparing cylinders
108:by a colorimetric method
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156:colorimetric analysis
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45:list of references
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104:Determination of
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18:Nessler tube
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