Home › QC Calculators › Standard Check
⚗️ Pharmaceutical QC Analytical Tool

Standard Check & System Suitability
Verification - Concept & Beginner Guide

New to Standard Check Testing? This guide explains the concept in plain language before you dive into the calculator.

📊 Standard Check % 📈 %RSD Precision 🔬 HPLC / GC / UV-Vis ✅ Pass / Fail Verdict 🧮 Full Math Log 💊 ICH Q2(R2) Compliant 📋 USP <621> SST 🏭 GMP / cGMP Ready
1
Select instrument and enter
acceptance limits
›
2
Enter Standard A and
Standard B weights
›
3
Enter Standard A and B
responses separately
›
4
Calculate Standard Check %,
%RSD, and verdict
›
5
Copy, print, or download
the complete QC report
🧮 Standard Check Calculator 📘 Concept & Beginner Guide 📖 Theory & Guidelines
📘 Quick Concept
🔬

What is a Standard Check?

A standard check verifies that the instrument and method are still giving the expected response before or during pharmaceutical sample analysis.

Standard Check % = (Avg A × Wt B × 100) ÷ (Avg B × Wt A)
💡

Real-world QC Example

Standard A confirms system precision through repeated injections. Standard B is compared against Standard A to confirm recovery remains inside the selected limit.

Example: 100.94% within 98.0% - 102.0% = Pass
💡 Beginner Tips

💡 Common mistakes before calculating

Include: Valid Standard A injections, valid Standard B injections, correct standard weights, and approved method limits.

Include Peak area or absorbance responses from the same method run and same preparation basis.
Do Not Include Blank injections, failed injections, trial injections, or responses from a different method condition.

Warning: If Standard Check % or %RSD fails, investigate before reporting sample results.

← Back to the Calculator