Ueno Protein Analyzer:What is a Ueno Protein Analyzer and what is its primary function?

Q: What is a Ueno Protein Analyzer and what is its primary function?

A: A Ueno Protein Analyzer is a specialized laboratory instrument used to determine the protein content in various samples, such as food, feed, and biological fluids. According to the Official Methods of Analysis of AOAC International, these analyzers often employ combustion or Dumas methods, where samples are burned at high temperatures and the resulting nitrogen gas is measured. The nitrogen content is then converted to protein using a specific factor. Ueno analyzers are known for their rapid, accurate, and automated operation, making them essential in quality control and research settings for ensuring product consistency and compliance with labeling regulations.

Q: How does a Ueno Protein Analyzer work based on the Dumas method?

A: The Ueno Protein Analyzer typically operates on the Dumas combustion principle. Per the International Dairy Federation standard (IDF 185), a sample is combusted in a pure oxygen environment at around 900–1000°C, converting nitrogen compounds into nitrogen gas (N2). Interfering gases are removed, and the N2 is quantified using a thermal conductivity detector. The protein content is calculated by multiplying the nitrogen value by a conversion factor (e.g., 6.25 for general foods). This method is faster and more eco-friendly than Kjeldahl, avoiding hazardous chemicals, and is officially recognized by AOAC and ISO for protein determination.

Q: What are the official standards and certifications for Ueno Protein Analyzers?

A: Ueno Protein Analyzers comply with major international standards. According to the AOAC Official Method 992.15 and ISO 16634-1, these instruments are validated for protein determination in cereals, animal feed, and food products. Additionally, the American Association of Cereal Chemists (AACC) Method 46-30 approves combustion analysis for protein. Ueno analyzers often carry CE and ISO 9001 certifications, ensuring manufacturing quality. Regulatory bodies like the FDA and USDA accept results from these analyzers for nutritional labeling and feed testing, provided calibration and maintenance follow the manufacturer's protocols, as outlined in the AOAC guidelines.

Q: What are the key advantages of using a Ueno Protein Analyzer over traditional Kjeldahl methods?

A: Ueno Protein Analyzers offer significant advantages over Kjeldahl methods, as noted in a report by the USDA Agricultural Research Service. They are much faster, completing analysis in minutes rather than hours, and require no hazardous chemicals like sulfuric acid or catalysts, enhancing safety and reducing environmental impact. Automation minimizes human error and allows multiple sample processing. Furthermore, the Dumas method used by Ueno analyzers has been officially approved by AOAC and ISO, with studies showing excellent correlation with Kjeldahl results. These benefits make them ideal for high-throughput laboratories needing reliable protein data for food and feed quality control.

Q: What calibration and maintenance procedures are recommended for Ueno Protein Analyzers?

A: According to the manufacturer's technical manual and AOAC guidelines, Ueno Protein Analyzers require regular calibration using certified reference materials such as EDTA or aspartic acid, which have known nitrogen content. Daily performance checks with a standard are advised to ensure accuracy. Maintenance includes replacing consumables like filters and oxygen regulators, and cleaning the combustion tube as specified. The FDA's laboratory quality control guidelines emphasize that calibration curves should be verified periodically, and results must fall within acceptable tolerances. Proper documentation of calibration and maintenance is essential for regulatory compliance and to maintain ISO 17025 accreditation in testing laboratories.

Dialogue about

Common scenarios of "Ueno Protein Analyzer"

【Sales Representative】 Hello, thank you for taking the time to meet with me today. I'd like to introduce you to the Ueno Protein Analyzer, a cutting-edge instrument for protein quantification. Could you tell me a bit about your current protein analysis workflow?

【Lab Manager】 Sure. We currently use Bradford and BCA assays, but they're time-consuming and sometimes inconsistent. We're looking for something faster and more accurate. What does the Ueno Protein Analyzer offer?

【Sales Representative】 Great question. The Ueno Protein Analyzer uses a novel microfluidic chip-based technology that requires only 2 µL of sample and gives results in under 5 minutes. It has a dynamic range from 0.1 to 2000 µg/mL and automatically corrects for interfering substances like detergents and reducing agents.

【Lab Manager】 That sounds impressive. How does it compare in terms of cost per test? Our budget is tight.

【Sales Representative】 The cost per test is about $1.50, which is competitive with traditional assays when you factor in labor and reagent waste. Plus, the instrument itself is priced at $15,000, and we offer a lease-to-own option.

【Lab Manager】 We might need to justify that expense. Can you provide a demo or a trial unit?

【Sales Representative】 Absolutely. We can arrange a two-week trial with a demo unit at no cost. I'll also provide a comparison study against your current methods so you can see the data firsthand.

【Lab Manager】 That would be helpful. What about maintenance and technical support?

【Sales Representative】 The Ueno comes with a one-year warranty covering parts and labor. After that, annual maintenance is $1,200, which includes software updates. Our support team is available 24/7 via phone or remote diagnostics.

【Lab Manager】 Good. What types of samples can it handle? We work with cell lysates, serum, and plant extracts.

【Sales Representative】 It's validated for all those matrices. The chip is designed to resist clogging, and the software has pre-set protocols for each sample type. You can also create custom protocols.

【Lab Manager】 How about data management? We need to comply with FDA 21 CFR Part 11.

【Sales Representative】 Yes, the Ueno has audit trails, user access controls, and electronic signatures. It's fully compliant with 21 CFR Part 11 and can export data in CSV or PDF formats.

【Lab Manager】 That's reassuring. What's the throughput? We often have 50-100 samples per day.

【Sales Representative】 The instrument can process up to 96 samples in a single run, with a total run time of about 30 minutes for 96 samples. So it easily handles your daily workload.

【Lab Manager】 And how much training is required for our staff?

【Sales Representative】 Minimal. The interface is intuitive, and we provide a half-day on-site training session. Most users are proficient after a few runs. We also have video tutorials and a comprehensive manual.

【Lab Manager】 What about the chip consumables? Are they proprietary?

【Sales Representative】 Yes, the chips are proprietary, but they are sold in packs of 100 for $150. That's included in the cost per test I mentioned. We also offer a subscription plan that reduces the cost further.

【Lab Manager】 I see. Can you send me a detailed quote and the trial agreement?

【Sales Representative】 Of course. I'll email them today. I'll also include a list of reference labs that use the Ueno, so you can hear their experiences.

【Lab Manager】 Perfect. Let's schedule the trial for next month. I'll discuss it with my team and get back to you.

【Sales Representative】 Great. I'll follow up next week to confirm the dates. Thank you for your time, and I look forward to working with you.