Caldur® MEKO – Photometric
MEKO determination in boiler water photometric (0.5-10 mg/l MEKO)
Private customers can also find our range in our partner store Ampha-Analyse.
Reagent for Caldur® MEKO – Photometric:
See also:
CALDUR® MEKO test set – Photometric
What is MEKO measured for?
MEKO (methyl ethyl ketoxime) is an oxygen binding agent that is used as an alternative to DEHA and sodium sulphite in steam boiler systems. It has the advantage that it remains stable even at high temperatures and does not form any decomposition products that contaminate the steam.
Precise dosing of MEKO is crucial for optimum corrosion protection. The photometric measurement enables an objective and precise determination of the concentration.
MEKO is preferably used in high-pressure steam boilers and in systems where steam cleanliness is particularly important.
How does the test set work?
The CALDUR® MEKO Test Set – Photometric is based on the ferrozine method. The reagents form a color complex with MEKO, the concentration of which is determined photometrically using the WINLAB Data Line photometer.
Advantages of the CALDUR® test set
- Measuring range 0.5 – 10 mg/l MEKO
Covers the practical dosing range
- 100 provisions per set
Economical for regular checks
- High precision due to photometric evaluation
Objective measurement results for optimum dosing
- Adapted to WINLAB Data Line photometer
Optimum compatibility
Areas of application
Carrying out the measurement:
- Take a boiler water sample and allow to cool to room temperature
- Fill the water sample into the test tube up to the mark
- Add reagent A and mix
- Add reagent B and mix
- Wait for 8 minutes reaction time
- Perform photometric measurement with WINLAB Data Line Photometer
Tip for best results
Boiler water samples must be cooled to room temperature before measurement. Hot samples falsify the result.
The sample should be measured as fresh as possible, as MEKO can oxidize in the air.
Important notes
- Allow sample to cool to room temperature before measuring
- Adhere exactly to the response time of 8 minutes
- Do not confuse MEKO and DEHA – different test sets required
- For values above 10 mg/l: dilute sample 1:1, measured value × 2
- Requires WINLAB Data Line photometer (Art. 37-000100)
Measuring range
| Property | Value |
|---|---|
| Measuring range | 0.5 – 10 mg/l MEKO |
| Resolution | 0.1 mg/l |
Number of possible destinations
With one CALDUR® Test Set MEKO Photometric you can carry out 100 measurements.
This refers to the quantity of reagents contained.
Recommended dosing ranges
| Application | Recommended MEKO content |
|---|---|
| Low pressure boiler (< 20 bar) | 1 – 3 mg/l MEKO |
| Medium pressure boiler (20-60 bar) | 0.5 – 2 mg/l MEKO |
| High pressure boiler (> 60 bar) | 0.5 – 1 mg/l MEKO |
The optimum dosage depends on the type of system, operating pressure and oxygen content. Consult the water chemist or the dosing system documentation for system-specific target values.
Specifications at a glance
| Property | Value |
|---|---|
| Parameters | MEKO (methyl ethyl ketoxime, C₄H₉NO) |
| Item number | 31-073402 |
| Method | Photometric (ferrozine) |
| Measuring principle | Photometric measurement with WINLAB Data Line Photometer |
| Measuring range | 0.5 to 10 mg/l MEKO |
| Duration of analysis | 8 minutes |
| Number of provisions | 100 |
| Number of reagents | 2 |
| Packaging | Plastic bag |
| Scope of delivery |
|---|
| 2 reagent bottles (reagent A, reagent B) with detailed labeling |
| 1 test tube with scale |
| Detailed operating instructions (DE/EN) |
| Safety data sheets for all reagents |
| Resealable plastic bag |
Reagent details
| Reagent | Volume | Shelf life | Notes |
|---|---|---|---|
| Reagent A (ferrozine) | 30 ml | 24 months (24M) | Ferrozine reagent, shake before use |
| Reagent B (reducing agent) | 10 ml | 24 months (24M) | Shake before use |
Shelf life: The shelf life starts from the date of manufacture (printed on the bottle).
After opening, the reagents should be used within 12 months.
Store the test kit in a dry, cool place (10-25°C) and protected from direct sunlight.
Additional information
| Packaging | Plastic bag, Refill pack |
|---|
Flyer
Operating instructions
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