Description
Specifications Table
Product Name – Dosatest test strips, pH 4.5 – 10.0 (Nonbleeding)
Quantity/Pack Size – 100 strips
Form – Paper strips
Grade – Laboratory/Analytical
Application – pH measurement in aqueous solutions, water testing, educational labs
Product Overview
Dosatest nonbleeding pH test strips (4.5–10.0 range) are engineered for precision and reliability in liquid pH analysis, eliminating the common issue of dye transfer that compromises traditional strips. Each strip features a stabilized colorimetric pad that resists bleeding, ensuring clean, unambiguous readings even in high-moisture environments or when testing viscous samples. The extended pH range covers slightly acidic to moderately alkaline solutions, making them versatile for general lab work, environmental monitoring, and water quality assessments. The strips utilize a proprietary indicator blend that delivers rapid color development (under 10 seconds) with minimal interference from common ions or organic compounds. Their non-porous backing prevents sample absorption, reducing cross-contamination between tests. The compact 100-strip pack includes a color comparison chart with 0.5 pH unit increments for granular accuracy, while the desiccant-lined container maintains reagent stability throughout the product’s 24-month shelf life when stored under standard lab conditions. Unlike glass electrode systems, these strips require no calibration or maintenance, offering a cost-effective alternative without sacrificing repeatability. The nonbleeding formulation also makes them particularly suitable for field applications where traditional strips might smear during handling or transportation.
FAQs
1. How do these pH strips differ from standard bleeding strips in terms of accuracy?
The nonbleeding formulation prevents dye migration between the indicator pad and the sample, which can cause false readings in traditional strips. This design maintains color integrity at the reaction site, reducing measurement variability by up to 15% compared to standard bleeding strips, particularly in solutions with high ionic strength or organic content.
2. What is the recommended procedure for reading the color change to avoid errors?
Remove the strip and immediately compare it to the color chart under consistent lighting (preferably daylight or a 6500K LED source). Read the color at the 10-second mark—delayed readings may show slight shifts due to CO₂ absorption. For optimal accuracy, hold the strip horizontally to prevent solution runoff from altering the indicator zone.
3. Are these strips compatible with non-aqueous or semi-solid samples like gels?
While designed for aqueous solutions, they can be used with hydroalcoholic mixtures (up to 30% ethanol) or water-based gels. For viscous samples, press the strip firmly against the surface for 2–3 seconds to ensure adequate contact. Avoid organic solvents or oil-based matrices, as these may dissolve the indicator or prevent proper color development.
4. How should unused strips be stored to maximize their shelf life?
Keep the container tightly sealed with the original desiccant pack at 15–25°C, away from direct sunlight and volatile chemicals. Humidity above 60% or temperature fluctuations can degrade the indicators. If stored properly, the strips retain full accuracy for 24 months from the manufacture date printed on the pack.
5. What alternatives exist for measuring pH outside this 4.5–10.0 range?
For acidic solutions below pH 4.5, consider Dosatest’s 0.0–6.0 range strips (cat. no. DT-pH6), which use a different indicator system optimized for strong acids. For highly alkaline samples above pH 10.0, the 8.0–14.0 range strips (cat. no. DT-pH14) provide extended coverage. For ultra-precise requirements (±0.1 pH), a digital pH meter with glass electrodes may be more suitable.
