Description
Specifications Table
Product Name – Whatman pH Indicator Test Strips
Quantity/Pack Size – pH0-14,6x80MM (Pack of 100) | pH4.5-10,6x80MM (Pack of 100) | pH1-12,11x100MM (Pack of 200) | pH1.8-3.8,11x100MM (Pack of 200) | pH3.8-5.5,11x100MM (Pack of 200) | pH5.2-6.8,11x100MM (Pack of 200) | pH6-8.1,11x100MM (Pack of 200) | pH8-9.7,11x100MM (Pack of 200) | pH9.5-12,11x100MM (Pack of 200) | pH 1-11 (Pack of 1) | pH 1-14 (Pack of 1) | pH 0.5-5.5 (Pack of 1) | pH 4-7 (Pack of 1) | pH 6.4-8 (Pack of 1) | pH 8-10 (Pack of 1) | pH1-11,10×10 (Pack of 1)
Form – Paper strips
Grade – Laboratory
Application – pH measurement in aqueous solutions
Product Overview
Whatman pH indicator test strips are engineered for precise pH determination across a broad spectrum of applications. Manufactured with high-quality cellulose paper impregnated with a proprietary blend of pH-sensitive dyes, these strips provide rapid color development upon contact with test solutions. The colorimetric response is calibrated to deliver accurate readings within seconds, eliminating the need for cumbersome glass electrodes in routine testing. Each variant is optimized for specific pH ranges, from ultra-acidic (pH 0.5-5.5) to highly alkaline (pH 9.5-12) conditions, ensuring versatility for diverse experimental requirements. The strips feature a non-bleeding dye formulation that maintains color stability during testing, while their porous structure facilitates efficient sample absorption. Designed for single-use applications, these strips minimize cross-contamination risks between samples. The extended 11x100MM format provides ample surface area for clear color differentiation, while the compact 6x80MM and 10×10 variants offer portability for field testing. All variants undergo stringent quality control to meet laboratory-grade standards, with consistent performance across temperature variations (15-30°C). The pH 0-14 and 1-14 full-range strips include a comprehensive color chart for precise interpolation between integer values. For specialized applications, narrow-range strips (e.g., pH 3.8-5.5 or pH 8-9.7) offer enhanced resolution in critical pH zones where small variations significantly impact experimental outcomes.
FAQs
1. Can these strips be used with non-aqueous solvents?
Whatman pH strips are specifically formulated for aqueous solutions. Non-aqueous solvents may interfere with the dye system, leading to inaccurate readings or no color change. For organic solvents, consider specialized pH indicators designed for non-aqueous applications.
2. What is the shelf life of these pH strips?
When stored in the original sealed container at room temperature (15-25°C) and protected from moisture, the strips maintain their accuracy for 24 months from the date of manufacture. Always check the expiration date printed on the packaging before use.
3. How do I interpret intermediate colors between the chart values?
For intermediate colors, compare the strip to the nearest color blocks on the chart and estimate the pH value between them. The pH 0-14 and 1-14 variants include half-unit increments on their charts to facilitate more precise interpolation in these broader range strips.
4. Are these strips affected by temperature variations?
The strips are calibrated for use at standard laboratory temperatures (20-25°C). Extreme temperatures may slightly alter the color development rate but generally don’t affect the final pH reading if the strip is allowed to stabilize. For critical applications, ensure samples and strips are at room temperature before testing.
5. Can I cut the strips to make them last longer?
While physically possible, cutting the strips is not recommended as it may compromise the dye distribution and affect accuracy. The strips are precisely manufactured to ensure uniform dye concentration across their entire surface, which could be disrupted by cutting.
