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Controlled vocabulary for MEASURED_UNIT, LOQ_UNIT, and LOD_UNIT, with conversion factors and base units

Source: R/fct_vocabulary.R
parameter_unit_vocabulary.Rd

Returns unit definitions and SI conversion factors for environmental measurements.

Usage

parameter_unit_vocabulary(select_column = NULL)

Arguments

select_column

Optional column name to extract: "MEASURED_UNIT", "BASE_SI_UNIT", "CONVERSION_FACTOR", or "UNIT_COMMENTS"

Value

A dataframe (if select_column is NULL) or a character vector (if column specified)

Details

Reads unit conversion data from unit_conversion_factors.csv containing standardised units for ecotoxicological and environmental measurements. The complete dataset includes columns:

MEASURED_UNIT: Unit as recorded in measurements

BASE_SI_UNIT: Corresponding SI base unit

CONVERSION_FACTOR: Numeric factor to convert to SI units

UNIT_COMMENTS: Additional notes about unit usage or conversion

Data source: extdata/unit_conversion_factors.csv

See also

Other measurement: example_measurements_tibble(), initialise_measurements_tibble(), measured_categories_vocabulary(), measured_flag_vocabulary(), measured_types_vocabulary(), uncertainty_types_vocabulary()

Examples

head(parameter_unit_vocabulary(), 5)
#> # A tibble: 5 × 4
#>   MEASURED_UNIT BASE_SI_UNIT CONVERSION_FACTOR UNIT_COMMENTS      
#>   <chr>         <chr>        <chr>             <chr>              
#> 1 mg/L          kg/m³        1e-3              mass concentration 
#> 2 μg/L          kg/m³        1e-6              mass concentration 
#> 3 ng/L          kg/m³        1e-9              mass concentration 
#> 4 pg/L          kg/m³        1e-12             mass concentration 
#> 5 mol/L         mol/m³       1000              molar concentration
parameter_unit_vocabulary(select_column = "MEASURED_UNIT") |> head(5)
#> [1] "mg/L"  "μg/L"  "ng/L"  "pg/L"  "mol/L"