Compounded Preparation - Hand Sanitizer - includes qs Ingredient strength

{
  "resourceType" : "Medication",
  "id" : "med0323",
  "contained" : [{
    "resourceType" : "Substance",
    "id" : "sub10",
    "instance" : false,
    "code" : {
      "concept" : {
        "coding" : [{
          "system" : "http://snomed.info/sct",
          "code" : "419442005",
          "display" : "Ethanol (substance)"
        }]
      }
    }
  },
  {
    "resourceType" : "Substance",
    "id" : "sub11",
    "instance" : false,
    "code" : {
      "concept" : {
        "coding" : [{
          "system" : "http://snomed.info/sct",
          "code" : "387171003",
          "display" : "Hydrogen peroxide (substance)"
        }]
      }
    }
  },
  {
    "resourceType" : "Substance",
    "id" : "sub12",
    "instance" : false,
    "code" : {
      "concept" : {
        "coding" : [{
          "system" : "http://snomed.info/sct",
          "code" : "80582002",
          "display" : "Glycerol (substance)"
        }]
      }
    }
  },
  {
    "resourceType" : "Substance",
    "id" : "sub13",
    "instance" : false,
    "code" : {
      "concept" : {
        "coding" : [{
          "system" : "http://snomed.info/sct",
          "code" : "444883009",
          "display" : "Distilled Water (substance)"
        }]
      }
    }
  }],
  "code" : {
    "text" : "WHO Hand Sanitizer Formulation 1% - 10L"
  },
  "doseForm" : {
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "739006009",
      "display" : "Solution (basic dose form)"
    }]
  },
  "ingredient" : [{
    "item" : {
      "reference" : {
        "reference" : "#sub10"
      }
    },
    "strengthQuantity" : {
      "value" : 8333,
      "system" : "http://unitsofmeasure.org",
      "code" : "mL"
    }
  },
  {
    "item" : {
      "reference" : {
        "reference" : "#sub11"
      }
    },
    "strengthQuantity" : {
      "value" : 417,
      "system" : "http://unitsofmeasure.org",
      "code" : "mL"
    }
  },
  {
    "item" : {
      "reference" : {
        "reference" : "#sub12"
      }
    },
    "strengthQuantity" : {
      "value" : 145,
      "system" : "http://unitsofmeasure.org",
      "code" : "mL"
    }
  },
  {
    "item" : {
      "reference" : {
        "reference" : "#sub13"
      }
    },
    "strengthCodeableConcept" : {
      "coding" : [{
        "system" : "http://hl7.org/fhir/CodeSystem/medication-ingredientstrength",
        "code" : "qs",
        "display" : "QS"
      }]
    }
  }]
}