MACHEREY-NAGEL Visocolor ECO Silica HR 200 Test Kit User Manual

MACHEREY-NAGEL Visocolor ECO Silica HR 200 Test Kit

Silica HR 200
Test kit for the photometric determination of silica in surface water and sewage

Method

• Silica reacts under acidic conditions (pH 1–2) with molybdate to form yellow colored molybdosilicic acid.
• The reaction principle is analogous to US standard methods 4500-Si D.

Measurement range

5–100 mg/L Si
10–200 mg/L SiO2

Contents of test kit

sufficient for 100 determinations

• 28 mL SiO2-1
• 20 g SiO2-2
• 28 mL SiO2-3
  • 1 measuring spoon 85 mm
  • 1 plastic syringe 5 mL
  • 1 instructions for use

Hazard warning
Information regarding safety can be found on the box’ label and in the sa-fety data sheet. You can download the SDS from www.mn-net.com/SDS

Instructions for use

Requisite accessories: test tube 16 mm OD (REF 91680).

1. Rinse test tube 16 mm OD several times with the sample and fill with 5 mL sample.
2. Place test tube in photometer (PF-3, PF-12Plus with special filter) as blank value and adjust for zero.
3. Add 5 drops of SiO2-1, close test tube and mix.
4. Add 1 level measuring spoon of SiO2-2 close test tube and mix. Wait for 2 min.
5. Add 5 drops of SiO2-3, close test tube and mix.
6. Clean outside of test tube and measure after 2 min.

Measurement
See manual for photometer PF-3, PF-12Plus.
After use, rinse out test tube thoroughly and seal them.

Disposing of the samples
Information regarding disposal can be found in the safety data sheet. You can download the SDS from www.mn-net.com/SDS.

Interferences:
The following quantity of phosphate will not interfere: ≤ 150 mg/L PO43–
In US standard methods 4500-Si D at least one form of silica is menti-oned which is unreactive with respect to molybdate.
Molybdate-unreactive silica can be converted to the molybdate-reactive form by heating or fusing with alkali (e.g. digestion with sodium bicarbo-nate NaHCO3).

Storage

• Store the test kit in a cool (< 25 °C) and dry place.

MACHEREY-NAGEL GmbH & Co. KG · Neumann-Neander-Str. 6–8 · 52355 Düren · Germany
Tel.: +49 24 21 969-0 · Fax: +49 24 21 969-199 · info@mn- net.com · www.mn-net.com

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