What is the pH value measured for in the alkaline range?

The pH value is one of the most important parameters in water analysis. In many industrial applications the relevant pH range is in the alkaline range (pH 7-14), for example when monitoring boiler water, cooling water, cleaning solutions and alkaline process solutions.

The MN pH test strips 7-14 offer a higher resolution in the alkaline range than universal test strips (0-14). With a graduation of 0.5 pH units, they allow a more precise determination in the range from pH 7 to 14.

Typical applications: boiler water monitoring (target pH often 10-12), control of alkaline cleaning solutions, monitoring of cooling water systems and concrete wastewater.

How do the test strips work?

The test strips are impregnated with special pH indicator dyes optimised for the alkaline range. The strip is dipped into the sample and the resulting colour is compared with the printed colour scale.

Reading: The colour scale is divided into steps of 0.5 pH units (7.0 / 7.5 / 8.0 / … / 14.0). This allows a more precise determination than universal test strips.

Benefits of the MN test strips

• Higher resolution: 0.5 pH steps

  More precise measurement than universal test strips (0-14)

• Optimised for the alkaline range pH 7-14

  Ideal for boiler water, cooling water and alkaline processes

• Quick measurement in about 1 minute

  Immediate results without reagents or instruments

• 100 determinations per tin

  Particularly economical for frequent checks

• No reagents required

  No mixing, no drops, no waste

Der Beitrag MN pH test strips 7-14 erschien zuerst auf RLS Wacon analytics.

What is the pH value measured for?

The pH value is one of the most important parameters in water analysis and indicates how acidic or alkaline a solution is. The scale ranges from 0 (strongly acidic) through 7 (neutral) to 14 (strongly alkaline).

The pH value influences almost all chemical and biological processes in water: corrosion behaviour, the effectiveness of disinfectants, the solubility of metals and the living conditions for organisms. The German Drinking Water Ordinance prescribes a pH range of 6.5 to 9.5.

The MN pH test strips 0-14 cover the entire pH range and are suitable for a quick orientation measurement in all areas of application – from swimming pool monitoring and wastewater control to laboratory work.

How do the test strips work?

The test strips are impregnated with special pH indicator dyes that change colour on contact with the solution according to the pH value. The strip is simply dipped into the sample and the resulting colour is compared with the printed colour scale.

Reading: The colour scale is divided into steps of 1 pH unit (0, 1, 2, … 14). Intermediate values can be estimated by colour comparison.

Benefits of the MN test strips

• Entire pH range 0-14

  Universally applicable for all applications

• Quick measurement in about 1 minute

  Immediate results without reagents or instruments

• 100 determinations per tin

  Particularly economical for frequent checks

• Simplest handling

  Dip, compare, read – no prior knowledge required

• No reagents required

  No mixing, no drops, no waste

Der Beitrag MN pH test strips 0-14 erschien zuerst auf RLS Wacon analytics.

What are nitrate and nitrite measured for?

Nitrate (NO₃⁻) and nitrite (NO₂⁻) are important nitrogen compounds in water analysis. The limit value for nitrate in drinking water is 50 mg/l, for nitrite 0.5 mg/l (German Drinking Water Ordinance). Both parameters must be monitored regularly.

Nitrate enters groundwater and surface water mainly through agricultural fertilisation and wastewater. Elevated nitrate concentrations can be harmful to infants (methaemoglobinaemia) and indicate contamination of the water catchment area.

Nitrite is formed as an intermediate product in the bacterial conversion of ammonium to nitrate (nitrification) and is more toxic than nitrate. In drinking water pipes, nitrite can form due to stagnation and bacterial activity.

The MN nitrate/nitrite test strips determine both parameters simultaneously in a single measurement – ideal for a quick orientation test.

How do the test strips work?

The test strips have two separate reaction zones: one for nitrate and one for nitrite. Both zones change colour when dipped into the sample according to the respective concentration. By comparing the colour with the printed scale, both values are read off simultaneously.

Nitrate reading: Colour scale with steps 0 / 10 / 25 / 50 / 100 / 250 / 500 mg/l NO₃⁻.
Nitrite reading: Colour scale with steps 0 / 1 / 5 / 10 / 20 / 40 / 80 mg/l NO₂⁻.

Benefits of the MN test strips

• Determine two parameters at once

  Nitrate AND nitrite in a single measurement – time-saving and practical

• Quick measurement in about 1 minute

  Immediate results without reagents or instruments

• 100 determinations per tin

  Particularly economical for regular checks

• Wide measuring range

  Nitrate 0-500 mg/l, nitrite 0-80 mg/l – covers all practically relevant ranges

• No reagents required

  No mixing, no drops, no waste

Der Beitrag MN nitrate/nitrite test strips erschien zuerst auf RLS Wacon analytics.