Particle Charge Detector for pH Dependency Determination of Sample Charge

• Product Usage: Particle Charge Detector
• Features 1: Sample Charge Quantification
• Features 2: Acid/Base Titration
• Features 3: Quick and Easy Setup
• Benefits 1: Exact Demand for Chemical Additives
• Benefits 2: Dentifies Additive Overdosages
• Benefits 3: Locates Weak Spots
• Benefits 4: Service Experts Around The World
• Transport Package: Wood Package
• Origin: China
• Production Capacity: Avaliable

Product Description

Company Profile

Great Uniontech is not only dedicated to manufacturing and developing paper chemicals but also attaches great attention and
importance to the application of our products. We enjoy transforming our products into productivity and value together with our customers.
From product supply Including all related services To solution provider To total chemicals management.
• Our paper chemicals solution:
•Good quality product supply with competitive prices and timely shipment.
•Application technical service.
•Paper chemicals manufacturing production line locally.
•Related chemicals equipment and machinery.

Product sheet

Particle Charge Detector

FEATURES

▪ Sample charge quantification through

polyelectrolyte titration

▪ Acid/base titration for pH dependency

determination of sample charge

▪ Compact and light for comfortable travelling

▪ Quick and easy setup

BENEFITS

▪ Shows the exact demand for chemical

additives for responsible resource deployment

▪ Identifies additive overdosages or wrong

reactions to save chemical additive costs

▪ Locates weak spots in water-based processes

to allow purposeful improvements

▪ Merges you with a team of GT application

and service experts around the world

GENERAL / BACKGROUND
The Particle Charge Detector measures the charge of colloidal dissolved substances in aqueous samples. In aqueous systems, solid particles as well as colloidal dissolved substances carry electrical surface charges, a phenomenon occurring in suspensions and emulsions. These charges influence the interaction of suspended and dissolved material with chemical additives.
The charge of a sample is quantified through a titration with a polyelectrolyte of opposite charge. For this purpose, the features an integrated titrator, that Particle Charge Detector can be configured with either one titration pump or with two titration pumps. For manual titration or for the connection to an external titrator, the variant Light without integrated titration pumps is available. Surface charged sample matter with a capability to accept or donate H+ or OH- change their charge density depending on the pH. To reveal the relation between pH and charge, the can handle acid/base titrations to determine the iso-electric point (IEP) of a sample. In the paper industry, the equipment is a standard tool for detecting anionic trash levels but also for characterizing chemical additives. Identification of charge levels is not only very important for the paper industry but also for numerous other applications like waste water treatment, the food and beverage industry, ceramics, colors, textiles and pharmaceuticals.

Charged colloids and particles of a size > 1nm can attract oppositely charged ions from the surrounding water. Separating these so called counterions from the particle creates a measurable potential difference. If such ion separation is achieved through a liquid flow, the potential is called streaming potential with the unit mV.

After a sample has been filled into the Particle Charge Detector measuring cell, sample colloids (1) adsorb to the inner surfaces (2) of the measuring cell, while its attracted counterions (3) remain comparatively mobile. Driven by a motor, the displacement piston (4) creates an intensive liquid flow (5), which separates the counterions from the adsorbed sample material.
At the electrodes built in the measuring cell, the counterions induce a current which is rectified and amplified electronically. A streaming potential with the appropriate sign is shown on the display. The integrated titrator recognizes the sign and automatically adds a polyelectrolyte of opposite charge and known concentration. The polyelectrolyte addition keeps going, until the end point (EP) of the titration is reached. This is the point of neutral charge (= 0mV), where all existing charges in a sample are neutralized. Out of the known titrant consumption required to reach the point of neutral charge, the charge content of the sample is calculated and displayed as measurement result.
 

APPLICATION EXAMPLES
The equip is suitable for a wide range of applications in process control, process
improvement and research, as for example in: PAPER Detection of anionic trash sources for a demandoriented dosage of fixatives. Charge characterization of chemical additives like sizing agents, wet strength agents, retention aids, pigments and their processability.
PROCESS- & WASTEWATER TREATMENT
Optimization of coagulants and flocculants applied in flotation units, for process water recovery or for the treatment of industrial and municipal wastewater. All solid-liquid separations achieved through charged additives are a potential use case for a  measurement. It reveals the current additive demand to ensure a demand-oriented dosage.
PIGMENTS
Stability characterization of pigment dispersions like lacquers, wall colors, coating ceramics, textile colors or cosmetic fillers. The stability of pigment dispersions correlates directly to their charge at a certain pH value. Low or no charge destabilizes these dispersions and makes them at least difficult to process.
CONSTRUCTION CHEMICALS
Evaluation of the dispersing power and adsorption capability of additives and admixtures in cement, concrete, mortar and gypsum

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