Introduction The increased use of the single aliquot regenerative (SAR) dose protocol and its current acceptance as the preferred protocol for dating quartz calls for efficient methods for purifying quartz. Common components of the sediment that need to be removed are salts, clays, carbonates, organic matter, heavy minerals and feldspars. Salts are usually water soluble; clays can be removed by sieving or decanting; carbonates are dissolved by 5-10% HCl; and organic matter is oxidized by concentrated peroxide or bleach.
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Naomi Porat (2006) studied this question.