Online Instrument OL1045N Portable Fully Automated UV Oil-in-Water Analyzer

Overview

The Online Instrument OL1045N is a portable, fully automated UV spectrophotometric analyzer engineered for in-field determination of petroleum hydrocarbons (oil) in aqueous matrices. It operates on the principle of ultraviolet absorption at 225 nm, in strict accordance with the Chinese national standard HJ 970–2018 “Determination of Petroleum Hydrocarbons in Water—Ultraviolet Spectrophotometric Method” and the marine monitoring specification GB 17378.4–2007 “Specifications for Marine Monitoring—Part 4: Seawater Analysis.” The instrument integrates sampling, n-hexane-based liquid–liquid extraction, magnesium silicate column adsorption, phase separation, solvent recovery, and UV absorbance quantification into a single ruggedized, wheeled enclosure. Its optical path is mechanically stabilized and shock-damped to maintain photometric integrity during mobile operation—enabling reliable deployment inside environmental monitoring vehicles without performance degradation.

Key Features

• Fully automated workflow: Automatic water sample volume recognition (non-contact optical detection), reagent dispensing, extraction, three-stage membrane-assisted phase separation, column-based polar/non-polar oil fractionation, and UV measurement—all executed sequentially without manual intervention.
• Magnesium silicate adsorption column system: Enables selective retention of polar compounds (e.g., plant/animal oils) while allowing petroleum hydrocarbons to pass through for quantification; column saturation status is continuously monitored and reported in real time via embedded sensor feedback.
• Integrated consumables management: Pre-loaded reagent vials (n-hexane), waste collection reservoirs, and sample containers are housed within the same chassis, minimizing field setup time and cross-contamination risk.
• Robust field-ready design: Constructed from high-impact engineering plastic with IP54-rated ingress protection; optimized weight distribution and telescoping handle facilitate transport across uneven terrain and onboard vehicle mounting.
• Intelligent user interface: Supports voice-guided operation, text-based troubleshooting prompts, and remote command execution via encrypted web interface accessible from iOS, Android, or desktop browsers.

Sample Compatibility & Compliance

The OL1045N is validated for use with surface water, groundwater, estuarine water, and seawater samples collected in standard wide-mouth HDPE or glass bottles (250–1000 mL). It accommodates variable turbidity and suspended solids levels typical of unfiltered field-collected matrices, provided sample homogeneity is maintained prior to loading. All analytical procedures align with HJ 970–2018 requirements for calibration curve linearity (R² ≥ 0.999), method detection limit (MDL ≤ 0.01 mg/L), and inter-laboratory reproducibility (RSD < 5% at 2 mg/L). Data acquisition and audit trails comply with GLP documentation standards, supporting traceability for regulatory reporting and enforcement applications.

Software & Data Management

Embedded firmware provides full method control, real-time process visualization, and local data storage (≥10,000 test records). Raw absorbance spectra, chromatographic-like elution profiles from column separation, and step-by-step log timestamps are exportable in CSV and PDF formats. Remote access enables live instrument status monitoring, method parameter adjustment, historical data retrieval, and over-the-air firmware updates. Audit logs record all user actions—including login events, calibration modifications, and result overrides—in compliance with ISO/IEC 17025 documentation requirements.

Applications

• Emergency response: Rapid on-site screening of oil spills in rivers, coastal zones, and harbors during incident assessment and containment verification.
• Regulatory compliance monitoring: Routine surveillance of discharge points, wastewater treatment effluents, and drinking water sources under municipal or provincial environmental protection mandates.
• Marine and estuarine research: Quantitative tracking of hydrocarbon contamination gradients in tidal flats, mangrove ecosystems, and nearshore sediment porewater interfaces.
• Mobile laboratory deployment: Integration into environmental monitoring vans or vessel-mounted platforms where space, power stability, and operator training constraints necessitate turnkey automation.

FAQ

What regulatory standards does the OL1045N support?
HJ 970–2018 (China’s national standard for petroleum hydrocarbons in water) and GB 17378.4–2007 (marine environmental monitoring specifications).
Can the instrument distinguish between mineral oil and biogenic oils?
Yes—via integrated magnesium silicate column separation, which selectively retains polar lipids (e.g., triglycerides) while permitting non-polar petroleum hydrocarbons to proceed to UV detection.
Is external calibration required before each analysis?
No—calibration curves are stored internally and can be applied automatically; however, daily verification using a mid-range standard (e.g., 4 mg/L) is recommended per HJ 970–2018 quality control protocols.
How is n-hexane waste managed during field operation?
The system includes a dedicated sealed waste reservoir with vapor barrier and volume-level sensor; spent solvent is retained for off-site disposal in accordance with local hazardous waste regulations.
Does the OL1045N support multi-user access with role-based permissions?
Yes—web interface supports administrator, operator, and viewer accounts with configurable access rights to method editing, data export, and system configuration functions.