📋 Workflow
Full workflow, products add-to-cart directly1
Electrode & instrument calibration
20 minCalibrate the pH meter and conductivity meter with standard buffers
💡 Tip Two-point calibration with pH 4/7/10
⚠️ Caution Use fresh calibration buffers
🧪 Materials for this step (click to shop by spec/brand)
2
Sample collection & temp
15 minCollect the water sample and equilibrate to measurement temperature
💡 Tip Measure promptly to avoid CO₂ effect
⚠️ Caution Stir thoroughly before reading
🧪 Materials for this step (click to shop by spec/brand)
3
pH measurement
15 minImmerse the electrode in the sample, wait for stable reading and record pH
💡 Tip Record after reading stabilizes
⚠️ Caution Rinse electrode with pure water
🧪 Materials for this step (click to shop by spec/brand)
4
Conductivity/turbidity
15 minMeasure conductivity and turbidity with their respective instruments
💡 Tip Conductivity uses automatic temperature compensation
⚠️ Caution Avoid bubbles in turbidity samples
🧪 Materials for this step (click to shop by spec/brand)
5
Record & assess
15 minRecord parameter values and compare against limits to judge compliance
💡 Tip Keep full raw records
⚠️ Caution Re-measure to confirm outliers
🧪 Materials for this step (click to shop by spec/brand)
⚠️ 5 Common Beginner Mistakes
- ① Uncalibrated electrode giving wrong values
- ② Expired calibration buffers
- ③ Sample not equilibrated to temperature
- ④ Dried/damaged electrode membrane
- ⑤ Slow measurement affected by CO₂
❓ FAQ
+Why does pH drift?
Aging electrode, CO₂ uptake or temperature change.
+How to maintain electrode?
Rinse with pure water and store in soaking solution.
+How often calibrate?
Two-point calibrate before each use.