Yoke FP6450 Flame Photometer
| Brand | Yoke |
|---|---|
| Origin | Shanghai, China |
| Model | FP6450 |
| Detection Elements | K, Na, Li, Ca, Ba |
| Detection Limits | K: 0.001 mmol/L |
| Na | 0.001 mmol/L |
| Li | 0.005 mmol/L |
| Ca | 0.01 mmol/L |
| Ba | 0.02 mmol/L (typical) |
| Response Time | <8 s |
| Repeatability | RSD ≤1.5% |
| Sample Uptake Rate | 6–8 mL/min |
| Display | 7-inch capacitive touchscreen LCD |
| Data Storage | Up to 10-point calibration curves and 200 sample results |
| Connectivity | USB port, USB flash drive export, cloud-enabled data synchronization |
| Safety Features | Automatic flame-out detection, gas leak alarm |
| Calibration Modes | Linear and piecewise linear (broken-line) |
| Power Supply | AC 220 V ±10%, 50 Hz ±1 Hz |
| Rated Power | 30 W |
| Printer | Optional external thermal printer |
Overview
The Yoke FP6450 Flame Photometer is a benchtop atomic emission spectrometer engineered for quantitative analysis of alkali and alkaline earth metals—including potassium (K), sodium (Na), lithium (Li), calcium (Ca), and barium (Ba)—in aqueous solution samples. Operating on the principle of flame atomic emission spectroscopy (FAES), the instrument atomizes and excites sample aerosols in a stable air-propane or air-butane flame; emitted characteristic radiation at element-specific wavelengths (e.g., 766.5 nm for K, 589.0/589.6 nm for Na) is isolated via optical filters and quantified by a photomultiplier tube or silicon photodiode detector. The FP6450 delivers rapid, reproducible measurements with sub-millimolar detection capability and response times under 8 seconds—making it suitable for routine quality control in clinical laboratories, agricultural soil testing, fertilizer formulation, pharmaceutical excipient analysis, and environmental water monitoring where regulatory compliance with ISO 11885 or ASTM D1293 may apply.
Key Features
- 7-inch high-resolution capacitive touchscreen interface enabling intuitive navigation, real-time signal visualization, and on-device curve fitting without external software
- Dual-channel simultaneous or sequential measurement architecture supporting independent calibration for up to five elements (K, Na, Li, Ca, Ba) with direct concentration readout
- Integrated safety subsystem including automatic flame extinction detection, propane/butane gas leak sensing, and interlocked gas shutoff—designed to meet IEC 61010-1 requirements for laboratory electrical equipment
- Onboard calibration engine supporting both linear regression and multi-segment (broken-line) standard curve construction with automatic correlation coefficient (r²) calculation and outlier flagging
- Local data management: stores up to 10 user-defined calibration curves and 200 raw test results with timestamp, operator ID, and sample ID fields
- USB host interface for direct export of CSV-formatted datasets to flash drives; supports firmware updates and method file transfer
- Cloud connectivity module compliant with TLS 1.2 encryption for secure remote data backup, multi-site instrument fleet monitoring, and audit-ready log archiving
Sample Compatibility & Compliance
The FP6450 accepts clarified, low-viscosity aqueous samples with total dissolved solids (TDS) < 0.5% w/v. It accommodates standard 13–16 mm diameter sample tubes and integrates seamlessly with peristaltic pumps for continuous flow analysis. Sample introduction is optimized for nebulization efficiency at 6–8 mL/min uptake rates, minimizing memory effects and carryover. Instrument performance aligns with key international standards for flame photometric analysis, including ISO 9297 (potassium in fertilizers), ISO 11885 (water quality—determination of selected elements by FAES), and AOAC Official Method 975.03 (Na/K in food). Its electronic logging and data integrity features support GLP-compliant workflows and partial alignment with FDA 21 CFR Part 11 requirements when deployed with configured audit trails and user access controls.
Software & Data Management
Data acquisition, calibration, and reporting are fully managed through the embedded Linux-based operating system. The touchscreen GUI provides guided workflows for calibration, sample measurement, QC checks, and report generation. All calibration parameters—including slope, intercept, r², and residual error—are stored with metadata (date/time, operator, standard lot number). Exported CSV files include raw intensity values, calculated concentrations, dilution factors, and statistical metrics (RSD, % recovery). Cloud synchronization enables centralized data aggregation across multiple FP6450 units, facilitating cross-laboratory trending, method validation documentation, and automated alerting for out-of-specification results. No proprietary desktop software is required for basic operation; optional web-based dashboard licenses provide advanced analytics and LIMS integration via RESTful API.
Applications
- Clinical diagnostics: serum and urine electrolyte profiling (Na⁺, K⁺) for renal function assessment and metabolic panel support
- Agricultural testing: rapid quantification of exchangeable K⁺ and Ca²⁺ in soil extracts per USDA NRCS protocols
- Food & beverage QA: salt content verification in processed foods, dairy products, and beverages per Codex Alimentarius guidelines
- Pharmaceutical manufacturing: assay of Na⁺/K⁺ counterions in active pharmaceutical ingredients (APIs) and excipients per USP & EP monographs
- Environmental monitoring: alkaline earth metal analysis in surface water, wastewater effluents, and leachates for compliance with EU Water Framework Directive parameters
- Industrial process control: real-time monitoring of boiler feedwater hardness (Ca²⁺, Mg²⁺ via indirect inference) and desalination plant brine composition
FAQ
What flame gases are compatible with the FP6450?
The instrument is optimized for use with compressed air and propane or butane. Acetylene is not supported due to excessive flame temperature and safety constraints.
Does the FP6450 support internal quality control (QC) sample checking?
Yes—users can define QC checkpoints within calibration curves and schedule periodic re-measurement of control standards with automatic pass/fail evaluation against preset tolerance bands.
Is method validation documentation available?
Yoke provides a comprehensive Instrument Qualification (IQ/OQ) protocol package, including linearity, precision, limit of detection (LOD), and robustness test templates aligned with ICH Q2(R2) principles.
Can the FP6450 be integrated into a laboratory information management system (LIMS)?
Via its secure cloud API or optional RS-232/USB virtual COM port emulation, the FP6450 supports bidirectional LIMS communication for sample dispatch, result ingestion, and electronic signature capture.
What maintenance is required for long-term stability?
Routine maintenance includes weekly nebulizer cleaning with 5% nitric acid, monthly optical filter inspection, and annual photodetector gain calibration using certified reference standards traceable to NIST SRMs.
