3 methods of radiometric dating

By increasing the rate of flow, one can increase the effect of the vacuum.A glass filter is placed at the bottom of the funnel and dampened with distilled water (dist. Afterwards, the sample is placed on top of the filter paper and a number of litres of distilled water poured in and drawn through the sample by the vacuum effect.Solvents are heated in a round-bottomed flask and evaporate up through a siphon into a condenser.

During this treatment, regular litmus readings are taken to determine the extent of the acidity remaining.

The humic fraction is acid insoluble and is removed using a base extraction method.

The fulvic fraction however, is soluble in acid and may be removed using an HCl wash.

Usually, dilute HCl (10% conc.) is used in this treatment.

It is added to the sample in a beaker which is placed on a hot plate and heated until slowly boiling.

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As the pressure increases in the sample tube, the solvents are gradually deposited back into the original flask, whereupon the process is repeated.

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