HACH Ammonia-N Prepackaged Reagent Sets for Water Quality Analysis
| Brand | HACH |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Product Category | Imported |
| Model | Ammonia-N Prepackaged Reagent Series |
| Price | USD 120 (approx. based on ¥950 at standard exchange rate) |
Overview
The HACH Ammonia-N Prepackaged Reagent Sets are standardized, factory-sealed reagent vials designed for accurate and reproducible determination of ammonia nitrogen (NH₃-N) concentration in drinking water, wastewater, surface water, and industrial effluents. These reagents implement the industry-standard colorimetric indophenol blue method (ASTM D1426-22, ISO 7150-1:1984), where ammonia reacts with hypochlorite and phenol under alkaline conditions in the presence of a catalyst to form a stable blue-colored complex. Absorbance is measured spectrophotometrically at 630–650 nm, enabling quantification across defined concentration ranges. Engineered for precision, consistency, and minimal operator intervention, each reagent set eliminates manual reagent preparation errors—critical for laboratories operating under EPA Method 350.1, Standard Methods 4500-NH₃ F, or ISO-compliant quality management systems.
Key Features
- Pre-weighed, pre-measured, and vacuum-sealed reagents ensure batch-to-batch consistency and eliminate volumetric pipetting errors.
- Stable shelf life of ≥24 months when stored at 2–8 °C; room-temperature stability verified for ≥6 months post-opening (per HACH Certificate of Analysis).
- Compatible with HACH DR series spectrophotometers (e.g., DR3900, DR6000), portable colorimeters (e.g., DR1900), and third-party UV-Vis instruments meeting photometric accuracy specifications (±0.005 AU at 630 nm).
- Each lot undergoes rigorous QC testing per ISO/IEC 17025-accredited protocols, including reference material traceability to NIST SRM 2783 (Ammonia Nitrogen in Water).
- Integrated lot-specific calibration curves embedded in HACH’s AquaTrack™ software—enabling automatic concentration calculation without manual curve fitting.
Sample Compatibility & Compliance
These reagents support direct analysis of clarified, non-turbid aqueous samples with suspended solids 200 mg/L Cl⁻), optional sample pretreatment (e.g., distillation per Standard Methods 4500-NH₃ E or salicylate interference correction) is recommended. The assay meets detection limits of 0.02–2.0 mg/L NH₃-N (as N) with typical repeatability ≤3% RSD (n=10, mid-range). All reagent formulations comply with REACH Annex XIV restrictions and are free of mercury, cadmium, and lead compounds. Documentation includes full SDS (GHS-compliant), CoA, and regulatory alignment statements for ISO 17025, GLP, and EPA-approved laboratory workflows.
Software & Data Management
When used with HACH’s proprietary data platforms—including the cloud-based HACH Insight™ and desktop AquaTrack™—the reagent sets enable full audit trail functionality compliant with FDA 21 CFR Part 11 requirements. Each measurement captures instrument ID, operator login, date/time stamp, reagent lot number, calibration status, and raw absorbance values. Data export supports CSV, PDF report generation, and direct integration into LIMS via HL7 or ASTM E1384 interfaces. Firmware updates for DR-series instruments automatically synchronize new reagent calibration files upon insertion of updated QR-coded vial labels.
Applications
- Regulatory compliance monitoring for municipal wastewater treatment plants (NPDES permits, EPA Clean Water Act reporting).
- Process control in biological nutrient removal (BNR) systems, including nitrification/denitrification unit optimization.
- Drinking water safety verification post-chloramination, especially where monochloramine decay correlates with free ammonia release.
- Environmental field studies requiring rapid, field-deployable ammonia screening with laboratory-grade reliability.
- Academic and research labs conducting nitrogen cycle modeling, aquatic toxicity assessments (e.g., LC50 determination for fish species), and eutrophication impact studies.
FAQ
What is the shelf life of unopened HACH Ammonia-N reagent vials?
Unopened vials retain full performance for 24 months when stored refrigerated at 2–8 °C. Storage outside this range may reduce stability—refer to the lot-specific CoA for validated conditions.
Can these reagents be used with non-HACH spectrophotometers?
Yes—provided the instrument delivers photometric accuracy ±0.005 AU at 630 nm, wavelength repeatability ≤1 nm, and has user-definable calibration curve entry. Validation against HACH reference standards is required prior to routine use.
Is distillation required for wastewater samples?
Distillation per Standard Methods 4500-NH₃ E is recommended for samples containing >200 mg/L chloride, >50 mg/L residual chlorine, or significant organic interferents (e.g., amines, aldehydes) to ensure method specificity.
Do these reagents meet ISO/IEC 17025 traceability requirements?
Yes—each production lot is certified against NIST-traceable ammonia standards, and full measurement uncertainty budgets are available upon request from HACH Technical Support.
How is reagent lot information integrated into electronic records?
QR codes on vial labels auto-populate lot ID, expiration date, and calibration coefficients into HACH Insight™ and AquaTrack™, satisfying ALCOA+ data integrity principles for regulated environments.
