{
  "key": "ph",
  "slug": "ph",
  "label": "pH",
  "description": "pH",
  "units": "pH",
  "units_nerc_p06": "http://vocab.nerc.ac.uk/collection/P06/current/UUPH/",
  "nerc_p01": "http://vocab.nerc.ac.uk/collection/P01/current/PHXXZZXX/",
  "category": {
    "key": null,
    "name": "Carbonate System",
    "icon": "cat-carbonate",
    "realm": "env",
    "order": 3
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  "climatology": false,
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    "valid_max": 9,
    "declared_by": [
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    "n_samples": 3265,
    "n_roots": 3265,
    "n_datasets": 1,
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      "source_column": "p_h",
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}