Lianhua Technology Ammonia Nitrogen Quick Test Kit – High-Range LH-NH3-K11 & Low-Range LH-NH3-K22
| Brand | Lianhua Technology |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | OEM/ODM Producer |
| Country of Origin | China |
| Model | LH-NH3-K11 / LH-NH3-K22 |
| Pricing | Available Upon Request |
Overview
The Lianhua Technology Ammonia Nitrogen Quick Test Kit (Models LH-NH3-K11 and LH-NH3-K22) is a field-deployable, colorimetric analytical system engineered for rapid, on-site quantification of aqueous ammonia nitrogen (NH₃–N) in environmental water samples. Based on the indophenol blue method—standardized under ISO 7150-1:1984 and aligned with EPA Method 350.1—the kit employs stable, pre-calibrated reagent formulations sealed within individual reaction vials. The high-range variant (LH-NH3-K11) covers 0.5–50 mg/L NH₃–N, while the low-range variant (LH-NH3-K22) delivers enhanced sensitivity across 0.02–2.5 mg/L NH₃–N. Designed for immediate visual interpretation without instrumentation, the system leverages standardized NIST-traceable color charts printed directly on each test box, enabling reliable semi-quantitative assessment under ambient daylight or controlled LED lighting conditions.
Key Features
- Field-Ready Visual Quantification: Eliminates dependency on spectrophotometers or portable readers; results interpreted via side-by-side comparison against integrated reference color standards.
- Dual-Range Configuration: LH-NH3-K11 optimized for wastewater effluent, surface runoff, and industrial discharge screening; LH-NH3-K22 calibrated for drinking water sources, groundwater monitoring, and aquaculture applications requiring sub-mg/L resolution.
- Stabilized Reagent Chemistry: All reagents—including sodium salicylate, sodium nitroprusside, and sodium hypochlorite—are pre-dosed in hermetically sealed vials with desiccant-lined caps, ensuring shelf stability ≥24 months at 4–30 °C.
- Minimal Operator Dependency: Requires only three steps: sample addition, vortex mixing (10 s), and incubation (10 min at 25 ± 2 °C); no pipetting calibration or instrument setup needed.
- Robust Packaging Architecture: Each kit contains 100 test vials, dual-range color charts, disposable polypropylene droppers, and laminated instruction cards compliant with GHS labeling requirements.
Sample Compatibility & Compliance
The kit is validated for use with clarified freshwater, treated wastewater, stormwater runoff, and filtered aquaculture effluents. Turbidity <10 NTU and residual chlorine <0.5 mg/L are recommended to prevent interference. Results meet data quality objectives outlined in ISO/IEC 17025:2017 for qualitative and semi-quantitative field methods. While not intended for regulatory reporting per se, data generated support Tier-1 screening under US EPA’s National Pollutant Discharge Elimination System (NPDES) preliminary assessment protocols and align with WHO Guidelines for Drinking-water Quality (4th ed.) action thresholds. All reagents conform to REACH Annex XIV sunset provisions and carry SDS documentation compliant with ANSI Z400.1-2015.
Software & Data Management
As a non-instrumental, analog colorimetric system, the LH-NH3-K11/K22 does not interface with digital software or cloud platforms. However, Lianhua Technology provides optional companion tools including a downloadable PDF-based logbook template (v2.1) supporting GLP-aligned manual entry of sample ID, time/date, observer initials, observed color match, and estimated concentration. For laboratories operating under 21 CFR Part 11–governed workflows, the kit may be integrated into electronic lab notebook (ELN) systems via scanned color chart annotations and metadata tagging—provided audit trails and reviewer sign-offs are maintained externally.
Applications
- Rapid verification of ammonia nitrogen removal efficiency in municipal wastewater treatment plant (WWTP) tertiary polishing stages
- Emergency response screening during chemical spills or agricultural runoff events affecting surface water bodies
- Pre-compliance checks prior to submission of samples to accredited labs for definitive analysis (e.g., IC or flow injection analysis)
- Field validation of online ammonia sensors deployed in distributed water quality networks
- Educational use in environmental science curricula for teaching fundamental principles of nutrient chemistry and colorimetric assay design
FAQ
What is the shelf life of unopened vials?
Unopened vials retain full performance for 24 months when stored between 4 °C and 30 °C in original packaging, away from direct UV exposure.
Can this kit be used for seawater analysis?
No—high chloride ion concentration (>500 mg/L) causes significant positive interference; matrix-specific validation is required before marine application.
Is there inter-lot consistency in color standards?
Yes—each production batch undergoes spectrophotometric verification against master reference charts traceable to CIE D65 illuminant standards.
How should used vials be disposed?
Treat as hazardous chemical waste per local regulations; residual reagents contain sodium nitroprusside (UN 1687) and require neutralization prior to disposal.
Does Lianhua provide third-party validation reports?
Yes—certified method validation summaries (per ISO 5725-2) and interlaboratory study data are available upon formal request to technical support.
