📋 Workflow
Full workflow, products add-to-cart directly1
Standard selection & check
15 minSelect primary/reference standards with clear traceability and purity; verify expiry
💡 Tip Use certified reference materials
⚠️ Caution Check certificate and purity
🧪 Materials for this step (click to shop by spec/brand)
2
Weigh & dissolve
20 minAccurately weigh on a calibrated balance and dissolve in solvent
💡 Tip Weigh by difference for accuracy
⚠️ Caution Calibrate the balance periodically
🧪 Materials for this step (click to shop by spec/brand)
3
Volumetric makeup
15 minTransfer to a volumetric flask, make up to the mark with solvent and mix
💡 Tip Read meniscus at the mark
⚠️ Caution Make up exactly to the mark
🧪 Materials for this step (click to shop by spec/brand)
4
Serial dilution
30 minDilute the stock serially to prepare working calibration solutions
💡 Tip Serial dilution minimizes error
⚠️ Caution Record dilution factors
🧪 Materials for this step (click to shop by spec/brand)
5
Storage & records
15 minLabel with preparation details and store under specified conditions
💡 Tip Store away from light, refrigerated
⚠️ Caution Log preparation and usage
🧪 Materials for this step (click to shop by spec/brand)
⚠️ 5 Common Beginner Mistakes
- ① Uncorrected purity lowering concentration
- ② Accumulated weighing errors
- ③ Improper makeup causing ratio error
- ④ Dilution error causing concentration deviation
- ⑤ Improper storage invalidating standards
❓ FAQ
+Why certified reference material?
Ensures traceability and comparability.
+How long do standards last?
Per validated shelf life; most last months if refrigerated/dark.
+Verify standard concentration?
Compare with an independent standard or prep.