Source: https://guthlabs.ai/docs/instruments/buffer-preparation-calculator/qualification/

instrument qualification / verified-with-binding-errata

# Buffer Preparation Calculator qualification

Verified with errata that must be applied at binding time.

Status: **VERIFIED_WITH_ERRATA**Lifecycle: **verified-with-binding-errata**

## Ledger verdict

Verified with errata that must be applied at binding time.

**Status**: VERIFIED_WITH_ERRATA

**Tranche**: tranche-4

**Review vectors**: 4

**Ledger rows**: 1

## Applied errata

````
[
  {
    "vector": 4,
    "field": "volumes + moles",
    "wrong": "acid 6.6667 mL, NaOH 3.3333 mL, water 90.0 mL, base_formed 0.0133333",
    "correct": "acid stock 20 mL (0.02 mol total needed), NaOH 6.656 mL of 2 M (0.013312 mol, r=10^0.30=1.99526), water 73.34 mL",
    "cause": "output volumes contradict her own working (which correctly says initial acid = 0.02 mol); also used 10^0.30=2 exactly"
  }
]
````

## Adversarial re-test context

The full catalog was re-tested from boundary, convention, and self-check angles in 2,787 requests. Five genuine computational defects were independently verified and corrected. This page reports the current ledger state for this instrument; it does not imply product deployment or interface qualification.

## Release gate

Bind every attached correction, replay the affected vectors, enforce boundary validation, and preserve evidence before describing the executable surface as qualified.

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/buffer-preparation-calculator/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/buffer-preparation-calculator/mechanism/>)[03**Implementation**](<https://guthlabs.ai/docs/instruments/buffer-preparation-calculator/implementation/>)

## Sources and evidence

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

- `VERIFIED_LEDGER.json`

- `STRESS_TEST_RECEIPT.json`

- `tranche errata record`