Lohan Technology Total Alkalinity Quick Test Kit LH-TA-K11

Overview

The Lohan Technology Total Alkalinity Quick Test Kit LH-TA-K11 is a field-deployable, colorimetric analytical system engineered for rapid, on-site quantification of total alkalinity in aqueous environmental samples—including surface water, groundwater, wastewater effluents, and drinking water distribution systems. Based on standardized acid–base titration chemistry with bromocresol green–methyl red mixed indicator, the kit delivers semi-quantitative to quantitative results within 90 seconds through visual comparison against a calibrated color chart. Total alkalinity—expressed as mg/L CaCO₃—is a critical water quality parameter reflecting buffering capacity against pH fluctuations, corrosion potential, and carbonate system equilibrium. The LH-TA-K11 adheres to core principles outlined in ASTM D1067 and ISO 9963-1, enabling reliable screening in compliance with national and municipal water monitoring protocols.

Key Features

• Field-Ready Visual Colorimetry: Integrated reaction vial and high-contrast, UV-stabilized color chart allow immediate interpretation without instrumentation; no power supply or calibration required.
• Optimized Reagent Formulation: Pre-measured, lyophilized reagents ensure consistent stoichiometry and minimized inter-batch variability; optimized for uniform chromogenic development across the 0–500 mg/L CaCO₃ range.
• Time-Efficient Workflow: Eliminates laboratory-based titration setup—sample introduction, reagent addition, and color development complete in under 2 minutes, supporting high-throughput field surveys.
• User-Independent Operation: Designed for technicians with minimal analytical training; no pipetting accuracy, endpoint detection skill, or volumetric glassware handling required.
• Stable Packaging Architecture: Hermetically sealed aluminum-laminated pouches protect reagents from moisture, light, and oxidation; shelf life exceeds 24 months at ambient storage (15–30 °C).

Sample Compatibility & Compliance

The LH-TA-K11 is validated for use with clarified, non-turbid water samples exhibiting turbidity < 5 NTU and suspended solids 5 mg/L PO₄³⁻), silica (>20 mg/L SiO₂), or heavy metals (e.g., Fe³⁺ > 0.5 mg/L) may suppress color development and necessitate sample dilution or filtration per EPA Method 310.1 guidance. The kit meets GB/T 5750.4–2023 (China National Standard for Drinking Water Quality Testing) and supports data traceability requirements under ISO/IEC 17025-accredited environmental labs when used within defined method validation parameters.

Software & Data Management

While the LH-TA-K11 operates as a standalone manual assay, digital integration is supported via optional companion mobile application (Lohan FieldLog™ v2.3+, iOS/Android). The app enables photo-based color matching using CIELAB ΔE*₀₀ algorithms, automatic result logging with GPS-tagged metadata, and export to CSV or PDF reports compliant with GLP documentation standards. Audit trails—including operator ID, timestamp, location stamp, and image capture history—are retained for 180 days and exportable for regulatory review under ISO 14001 or local environmental agency reporting mandates.

Applications

• Routine surveillance of municipal water treatment plant influent/effluent streams
• Emergency response assessment following industrial discharge incidents or algal bloom events
• Field validation of online alkalinity sensors during calibration verification
• Education and outreach programs requiring safe, non-hazardous chemistry demonstrations
• Pre-screening prior to formal laboratory analysis under ISO 17025 or US EPA-approved methods

FAQ

What is the measurement range and detection limit of the LH-TA-K11?
The kit provides visual quantification from 0 to 500 mg/L as CaCO₃, with an effective resolution of ±10 mg/L within the 0–100 mg/L sub-range and ±25 mg/L above 100 mg/L.
Can the LH-TA-K11 be used for seawater or brackish water analysis?
No—high chloride interference (>10,000 mg/L Cl⁻) disrupts indicator equilibria; use only for freshwater matrices unless pre-diluted and matrix-matched with standard additions.
Is this kit suitable for regulatory reporting?
It serves as a screening tool per GB/T 5750.4–2023 Annex B; definitive compliance reporting requires confirmation by titrimetric method (e.g., ISO 9963-1) in an accredited laboratory.
How should expired kits be disposed?
Discard as non-hazardous solid waste per local regulations; reagents contain no heavy metals or persistent organic pollutants.
Does Lohan Technology provide method validation documentation?
Yes—Certificate of Analysis (CoA), stability study reports, and interlaboratory precision data (n=12 labs) are available upon request for QA/QC implementation.