AM Scientific

DPD tablets are chemical reagents used in water testing to measure chlorine levels, with different types measuring free chlorine (DPD No. 1) and combined chlorine (DPD No. 3). They work by reacting with chlorine or bromine in a water sample to produce a pink-to-red color, which is then compared to a standard or measured with a colorimeter. These tablets are vital for ensuring proper disinfection in swimming pools and drinking water. DPD tablet types and function

• DPD No. 1 Tablets: Measure free available chlorine, which is the active disinfectant left in the water. They are used in water testing kits for swimming pools, drinking water, and industrial processes.
• DPD No. 3 Tablets: Measure combined chlorine (chloramines) by reacting with a water sample that already has DPD No. 1 added.
• Combined Chlorine Calculation: To find the total amount of combined chlorine, you subtract the free chlorine value (from DPD No. 1) from the total chlorine value (measured after adding DPD No. 3). 

How to use DPD tablets

1. Crush one or more DPD tablets (depending on the test kit instructions) in a sample tube or cuvette with a small amount of water.
2. Add the rest of the water sample to the tube and swirl to mix.
3. Wait for the color to develop, which indicates the chlorine concentration.
4. Compare the color to a color chart or use a colorimeter/photometer to get a precise measurement. 

Important considerations

• Safety: Always follow the safety and handling instructions on the product label.
• Accuracy: Ensure proper lighting and a clean, uncontaminated container for accurate results.
• Storage: Store tablets in a cool, dry place away from acids and alkalis to maintain their shelf life. 

DPD tablets are used in water testing, specifically for determining chlorine and other disinfectant levels like bromine and ozone. DPD (N,N-diethyl-p-phenylenediamine) acts as an indicator, changing color in the presence of these substances. Different DPD tablet types, such as DPD No. 1, No. 2, No. 3, and No. 4, are used to measure different chlorine components (free, combined, and total) or other oxidizing agents like ozone. Here's a breakdown of the common DPD tablet types:

• DPD No. 1:Measures free chlorine or bromine. It can also be used to determine the presence of ozone and monochloramine-dichloramine. 
• DPD No. 2:Used in conjunction with DPD No. 1 to determine combined chlorine (chloramines). 
• DPD No. 3:Used with DPD No. 1 to determine total chlorine or bromine. 
• DPD No. 4:Used to measure total available chlorine and also reacts with ozone, making it suitable for ozone testing. 

The DPD method is widely used in water quality testing, particularly for swimming pools and spas, as well as in drinking water analysis. It is a simple and reliable way to monitor disinfectant levels and ensure water safety. 

DPD No. 1 tablet is used to determine the free chlorine. The tablet is placed in a cuvette with a few drops of the water sample and crushed, sample water is added and mixed by swirling. The value can be measured immediately.

•     Green Chemistry without boric acid
•     Highest accuracy of test results
•     Easy handling & application
•     Exact dosing & enormous shelf life

The DPD method is elementary for the determination of chlorine and for the correct dosing of the water care product. The DPD No.1 tablet is used to determine the free chlorine. The tablet is placed in a cuvette with a few drops of the water sample and crushed, sample water is added and mixed by swirling. The value can be measured immediately. DPD No.1 is also used for the determination of bromine, ozone and monochloramine-dichloramine.

Lovibond DPD No. 1 tablets are used in water testing to determine free chlorine levels, a crucial component in maintaining water quality, especially in swimming pools and drinking water. These tablets are typically used in conjunction with a comparator, such as the Lovibond Comparator 2000+, and are essential for ensuring proper disinfection and preventing contamination. Key Features and Usage:

• Measures Free Chlorine:DPD No. 1 tablets react with free chlorine in the water sample, producing a color change that is then measured to determine the chlorine concentration. 
• High Calcium Compatibility:Lovibond also offers DPD No. 1 High Calcium tablets, specifically designed for water with high calcium hardness, ensuring accurate results in various water conditions. 
• Simple Dissolving Process:The tablets are designed for easy dissolution in a water sample. Users typically add a few drops of the water sample to the cuvette, crush the tablet, add more water sample, and then swirl to mix. 
• Colorimetric Measurement:The resulting color is then compared against a color scale or measured using a comparator to determine the free chlorine level. 
• Applications:DPD No. 1 tablets are widely used in swimming pools, drinking water treatment, and industrial water systems. 

Additional Information:

• DPD Method:The DPD (N,N-diethyl-p-phenylenediamine) method is a standard procedure for determining chlorine levels in water, and DPD No. 1 is a key reagent in this method. 
• Other DPD Reagents:DPD No. 2 and DPD No. 3 tablets are also available for measuring combined chlorine (Chloramine) and total chlorine, respectively, allowing for a more comprehensive analysis of water quality. 
• Green Chemistry:Some Lovibond DPD No. 1 tablets are formulated without boric acid, promoting environmentally conscious testing procedures. 

Lovibond 511312BT is a pack of 500 fast-dissolving DPD No. 1 Rapid reagent tablets used for high-precision, boric acid-free, and rapid measurement of free chlorine ( Br) and bromine in water, swimming pools, and spa, designed for Lovibond comparators and test kits. The tablets are packed in aluminum foil blister strips for long-term stability and easy handling. Lovibond Water Testing and Colour Measurement +4Key Features and Specifications:

• Part Number: 511312BT
• Method: DPD No. 1 Rapid
• Application: Free Chlorine, Bromine
• Pack Size: 500 tablets
• Packaging: Aluminum foil blister (new, improved, smaller,  size)
• Accuracy: High-precision results
• Environment: Boric acid-free (Green Chemistry)
• Shelf Life: Long-term shelf life Lovibond Water Testing and Colour Measurement +6

Use Cases:
These tablets are primarily designed for use with Lovibond equipment, such as: 

• Lovibond Comparator 2000+
• Pooltester and other test kits
• Photometers and colorimeters

Aquasol free chlorine test kits, like the AE205 and AE215, are designed for accurate and convenient on-site testing of free chlorine levels in water, using the DPD method. They are typically used in various settings, including domestic water disinfection, taste and odor removal, and for monitoring chlorine levels in pools and spas. These kits are known for their ease of use, reliability, and ability to provide fast, precise measurements. Key features and benefits of Aquasol free chlorine test kits:

• Accurate and reliable results:The kits are designed to deliver precise chlorine measurements, often meeting international standards. 
• Ease of use:They often feature simple, step-by-step procedures, making them suitable for both beginners and experienced users. 
• Cost-effective and convenient:The kits offer a cost-effective method for periodic monitoring of free chlorine levels, with some kits designed for 200 tests. 
• Portable and compact:The kits often come in a portable carry case, allowing for testing in the field. 
• Based on DPD method:The kits utilize the DPD (N,N-diethyl-p-phenylenediamine) method, which is a widely accepted method for determining free chlorine levels. 
• Fast results:The color change in the test is designed to be easily visible, allowing for quick determination of chlorine levels. 
• Long shelf life:The kits are designed to have a long shelf life, providing value for extensive testing. 

A chlorine dioxide test kit is a device used to measure the concentration of chlorine dioxide in a solution, typically water. These kits are essential for monitoring and controlling chlorine dioxide levels, particularly in applications like water treatment, where maintaining appropriate concentrations is crucial for disinfection and other purposes. Key components and features of a chlorine dioxide test kit:

• Test Strips or Reagents:Kits may utilize test strips that change color when exposed to chlorine dioxide, allowing for visual comparison against a color chart to determine concentration. Alternatively, some kits use reagents that react with chlorine dioxide to produce a color change, which is then measured using a colorimeter or photometer.
• Color Comparator or Photometer:These devices are used to accurately determine the chlorine dioxide concentration based on the color change observed in the test. Color comparators provide a visual comparison against a color scale, while photometers use light absorbance to provide a more precise measurement.
• Instructions and Accessories:Test kits typically come with detailed instructions on how to perform the test, as well as any necessary accessories like vials, droppers, or mixing solutions. 

How they work:

1. 1. Sample Collection:A sample of the solution to be tested is collected, ensuring it's representative of the overall solution. 
2. 2. Test Procedure:The test strip or reagent is added to the sample, and a reaction occurs, causing a color change if chlorine dioxide is present. 
3. 3. Measurement:The color change is then compared to a color chart (in the case of test strips) or measured using a colorimeter or photometer to determine the chlorine dioxide concentration. 
4. 4. Interpretation:The measured concentration is then compared to the desired range for the specific application, and adjustments can be made if necessary. 

Applications:

• Water Treatment:Monitoring chlorine dioxide levels in drinking water, wastewater, and industrial cooling water is vital for effective disinfection and preventing microbial growth. 
• Food and Beverage Industry:Chlorine dioxide is used for sanitation purposes in various food and beverage processing facilities, and test kits help ensure proper levels for effective sanitation. 
• Swimming Pools:Chlorine dioxide can be used as a disinfectant in swimming pools, and test kits help maintain optimal levels. 
• Other Applications:Chlorine dioxide is also used in various other industrial and commercial applications, such as pulp and paper bleaching, and test kits are essential for monitoring its concentration. 

Sodium chloride (NaCl), commonly known as salt, is an ionic compound. It's a white, crystalline solid that's highly soluble in water. It's the primary salt in seawater and is widely used as table salt for seasoning and food preservation, as well as in various industrial processes. Here's a more detailed description:

• Chemical Formula: NaCl 
• Composition: A 1:1 ratio of sodium (Na+) and chloride (Cl-) ions 
• Physical Properties:
  • Colorless and odorless 
  • Cubic white crystalline solid 
  • High solubility in water 
• Occurrence:
  • Found in seawater (approximately 1-5% of seawater's composition) 
  • Also found as rock salt (halite) 
• Uses:
  • Food: Table salt for seasoning, flavoring, and food preservation 
  • Industrial: Source of sodium and chlorine for further chemical synthesis, de-icing roads, and various industrial processes 
  • Other: Used in oil and gas exploration, concrete curing, textiles and dyeing, and as a desiccant (moisture absorber) 
• Biological Significance:
  • Essential for maintaining fluid balance and nerve impulse transmission in the body 
  • Plays a role in various physiological processes, including muscle relaxation and nutrient absorption 

The Lovibond® TB 211 IR (item code 266030) is a compact, portable turbidimeter designed for fast and precise on-site water analysis. It utilizes an infrared light source to ensure accurate measurements of both colored and colorless water samples by minimizing interference from sample color. Lovibond Water Testing and Colour Measurement +3Key Features & Capabilities

• Measurement Standard: Fully compliant with EN ISO 7027 standards, using the nephelometric method (90° scattered light detection).
• Wide Measuring Range: Covers 0.01 to 1100 NTU (also FNU, TE/F) with an automatic range switching (Autorange) feature.
• Data Management: Features a built-in USB interface for direct data transfer to a PC and an internal ring memory capable of storing up to 125 data sets.
• On-Site Ready: Includes a splash-proof polycarbonate membrane keypad, a backlit LCD for low-light conditions, and a rugged carrying case.
• Calibration: Offers easy calibration with the supplied T-CAL standards or user-defined standards. Lovibond Water Testing and Colour Measurement +6

Technical Specifications

+9The Lovibond® CHECKIT® Comparator Ozone Kit is a handheld, visual water testing tool (e.g., Part 147270) designed for fast, accurate Ozone () measurement using DPD tablet reagents. It includes a comparator housing, color disc, sample cells, and reagents, allowing users to match colors against a disc for reliable 0-1 mg/L  readings. Lovibond Water Testing and Colour Measurement +2Key Features and Description

• Methodology: Uses the DPD method to determine ozone concentration, including options to test in the presence of chlorine.

Lovibond Phenol Red Rapid tablets are fast-dissolving, high-accuracy reagent tablets used to measure pool and spa pH levels (typically 6.5–8.4 range). Designed for color comparators and pool testers, they feature boron-free "Green Chemistry," include thiosulphate to neutralize chlorine interference, and come in aluminum blister packaging for long shelf life. Key Features and Description

• Rapid Dissolution: Specially formulated to dissolve quickly in water samples for faster, more convenient testing compared to standard tablets.
• Usage: Ideal for routine testing in pool testers, handheld comparators, and test kits.
• Measurement: Measures pH within the crucial 6.5–8.4 range, ensuring optimal water sanitation and bather comfort (target range 7.2–7.6).
• Chlorine Compensation: Contains thiosulphate, which neutralizes the interfering effects of chlorine on pH, ensuring accurate results in pool and spa water analyses.
• Packaging: Each tablet is individually sealed in an aluminum blister pack (foil-wrapped), protecting them from moisture, sunlight, and contamination.
• Application: Simply drop one tablet into the comparator's sample tube, allow it to dissolve, and compare the resulting color to the scale.
• Safety: "Green Chemistry" formula, free from boric acid. 

Common Pack Sizes

• 10 Pack
• 100 Pack
• 500 Pack 

The SD series comprises a range of compact, easy-to-use, hand-held instruments for the accurate measurement of pH, ORP, Con, TDS or Salt. With robust housing and fully waterproof (IP67) casing, these testers are the ideal solution for in-situ testing in environmental, industrial or pool & spa applications. The intuitive scroll-bar functionality and backlit display enable the easy measurement and simultaneous display of result, temperature, date/time and other measurement details. With 25 sets of data storage, each with date and time stamp, the units also enable the easy recalling of data for record keeping requirements. Designed and manufactured according to Lovibond®  quality standards, the devices are equipped with replaceable electrodes to ensure long-life functionality in the field. Measuri

Technically advanced A particularly high resolution (0.001 pH / 0.1 mV) for maximum accuracy, automatic temperature compensation and buffer detection are further features of the SD 300 pH. User-friendly Handling The comfortable handling is completed by a large, backlit display. So you have the measurement results directly in view in every situation. Data management Data collected by the data logger can be transferred to the computer via USB interface (serial or analogue). Housing The protective reinforcement not only guarantees safe working at all times, even in extreme environmental conditions. The stand attached to the back of the housing can also be used as a hanger or belt clip. Additional equipment Battery and electrode status indication, battery replacement indicator, auto-off, auto-hold, min./max. Value memory are also included as functions.