Sample type and size requirements

A wide range of sample types can be submitted for dating. We can advise on the suitability of different materials and the most effective pretreatments.

Table 1: Sample size requirements (Dry weights*)

Material AMS Dating (ideal weight)
Wood 50mg
Charcoal 50mg
Carbonates 50mg
Peat^ 1-5g
Bone^ 1-5g
Lake Sediment^ 1g
Water (DIC) 100ml
Methane ~ 20mls of >15% methane

 

* Recommended weights given are for clean, dry material.
^ Ranges reflect varying carbon content (weights approximate).

Table 2: Approximate size of standard error (±1 sigma)

Sample age (yrs) Approximate standard error for AMS
500 <20
1000 <20
5000 20
10,000 25
20,000 60
30,000 250
40,000 500
50,000 -

 

* Recommended weights given are for clean, dry material.
^ Ranges reflect varying carbon content (weights approximate).