📋 Workflow
Full workflow, products add-to-cart directly1
Sampling & preservation
20 minAcidify and refrigerate water samples to prevent precipitation/adsorption
💡 Tip Use polyethylene bottles to avoid adsorption
⚠️ Caution Sample representative and homogeneous
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2
Sample digestion
60 minDigest by microwave or wet method into a clear solution
💡 Tip Guard against volatilization for Hg/As
⚠️ Caution Work in fume hood
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3
Standard preparation
30 minDilute mixed metal stock standards into a calibration series
💡 Tip Set range per target element
⚠️ Caution Match standard matrix to sample
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4
Instrument measurement
60 minMeasure with ICP-MS/ICP-OES or graphite furnace AAS
💡 Tip Use isotope IS to correct matrix effects
⚠️ Caution Keep argon flow stable
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5
QC & report
30 minVerify with spike recovery and reference material, then calculate and report
💡 Tip Target spike recovery 80–120%
⚠️ Caution Verify dilution factor and units
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⚠️ 5 Common Beginner Mistakes
- ① Incomplete digestion lowering metal results
- ② Container adsorption causing loss
- ③ Matrix interference affecting accuracy
- ④ Blank contamination raising background
- ⑤ Volatilization loss of Hg/As
❓ FAQ
+Purpose of acid preservation?
Prevents adsorption/precipitation and stabilizes metals.
+Avoiding mercury loss?
Refrigerate, avoid volatilization, measure promptly.
+Which methods for heavy metals?
ICP-MS/OES, graphite furnace AAS and hydride AFS.