Organic measures

Sample reference

sample_reference

Sample reference is a unique identifier assigned first by the compiler and then by the IsoArcH database to each collected sample. In each dataset, these numbers will span from 1 to n, with n representing the maximum number of samples compiled. Once in the IsoArcH database, this identifier will include the dataset number as a prefix. GRIST may automatically populate this field. Example: 1

Type	Sections	Required
identifier	hominins bio, samples, mineral measures, organic measures, radiocarbon measures	Yes

Tooth fraction

tooth_fraction

Legacy names

fraction of tooth sample

Tooth fraction refers to the particular portion of the tooth that has been sampled.

Type	Sections	Validations	Required
string	mineral measures, organic measures, radiocarbon measures	Lowercase: yes	No

Allowed Values:

• dentine
  
• enamel
  
• pulp
  

Result type

result_type

Result type is a field that enables specification of the type of measured value being reported. When multiple values, such as a range, are applicable to a specific sample, this field should be completed multiple times, each on a separate line.

Type	Sections	Validations	Required
string	mineral measures, organic measures	Lowercase: yes	No

Allowed Values:

• min
  
• max
  
• mean
  
• exact
  

Sampled zone identifier

sampled_zone_identifier

Legacy names

serial order

Serial order enables the numbering of sequential samplings taken from a specific sample, typically from dentine, enamel, or hair.

Type	Sections	Required
string	mineral measures, organic measures	No

Chemical pretreatment?

chemical_pretreatment

Legacy names

chemical pre-treatment?

Chemical pre-treatment used.

Type	Sections	Validations	Required
boolean	organic measures	Lowercase: yes	No

δ13C (‰vpdb)

d13c

Type	Sections	Required
decimal	organic measures	No

δ13C (‰vpdb) sd

d13c_sd

Type	Sections	Required
decimal	organic measures	No

δ15N (‰air)

d15n

Type	Sections	Required
decimal	organic measures	No

δ15N (‰air) sd

d15n_sd

Type	Sections	Required
decimal	organic measures	No

δ34S (‰vcdt)

d34s

Type	Sections	Required
decimal	organic measures	No

δ34S (‰vcdt) sd

d34s_sd

Type	Sections	Required
decimal	organic measures	No

%C

percent_c

Type	Sections	Required
decimal	organic measures	No

%S

percent_s

Type	Sections	Required
decimal	organic measures	No

%N

percent_n

Type	Sections	Required
decimal	organic measures	No

C:N

c_n

Type	Sections	Required
decimal	organic measures	No

N:S

n_s

Type	Sections	Required
decimal	organic measures	No

C:S

c_s

Type	Sections	Required
decimal	organic measures	No

Collagen yield (%)

collagen_yield

Type	Sections	Required
decimal	organic measures	No