mtv 90s dating show - Collagen content dating

The Na OH treatment produces two fractions, base soluble and insoluble.

The former may be kept for dating purposes by being acidified, rinsed and dried in an oven.

They are easily incorporated by sample materials, affecting the ages of each.

There are two major decay contaminants; humic acids and fulvic acids.

The samples most often given solvent pretreatments such as this are wood, soil organics, peat and charcoal, from specific environments.

A variety of solvents may be used in the extraction process, depending on the type of material and the contaminants present.

The acid insoluble fraction should contain the original, pristine sample, minus the carbonate contaminants, if the acid wash has had its desired effect.

It is placed in a petrie dish or beaker and dried in an oven prior to combustion or further pretreatment.

It is then rinsed in a buchner funnel with distilled water to reduce the p H levels towards neutral.

Following this, the sample is immersed in a 5% diluted, boiling Na OH solution for approximately one hour, after which it is rinsed or centrifuged again.

Sodium hydroxide (Na OH) treatment is usually associated with the removal of humic acid contamination from soils, wood, charcoal and peat samples.

Humic acids are the mobile decay products of biological materials deposited in the vicinity of the sample matrix.

By increasing the rate of flow, one can increase the effect of the vacuum.

Tags: , ,