Source: https://guthlabs.ai/docs/instruments/brine-marinade-salinity-calculator/implementation/

instrument implementation / implementation-contract

# Brine & Marinade Salinity Calculator implementation

A source-bound implementation contract for Brine & Marinade Salinity Calculator; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t2-043

**Effect**: Computation or source lookup only

## Input and validation requirements

The zero-water, zero-salt input produces a 0/0 salinity result and must be rejected. The specification also does not state validation for target percentages at or above 100%, where the inverse formula becomes undefined or returns a negative salt mass.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "water_volume_ml": 1000,
    "solute_type": "salt",
    "solute_mass_g": 50,
    "target_percent": 5
  },
  "expected_outputs": {
    "required_salt_mass_g": 52.63157895,
    "resulting_brine_percent": 4.76190476
  },
  "working": "Water mass = 1000 mL × 1.000 g/mL = 1000 g. Required mass = (5/(100−5)) × 1000 = (5/95) × 1000 = 52.63157895 g. Resulting brine percentage = 50/(50+1000) × 100 = 50/1050 × 100 = 4.76190476%."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/brine-marinade-salinity-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/brine-marinade-salinity-calculator/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/brine-marinade-salinity-calculator/qualification/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json`

- `evidence-tranche2/tranche2-results.json`