"High-Precision Analysis of Volatile Organic Compounds and Odor Compounds in Drinking Water Using HS-SPME Arrow-GC-MS" #Technical Document #Application Note

High-Precision Analysis of Volatile Organic Compounds and Odor Compounds in Drinking Water by HS-SPME Arrow-GC-MS

Testing for volatile organic compounds (VOCs) in drinking water is widely conducted to ensure its safety. Furthermore, odor substances such as methyl isoborneol (MIB) and geosmin are monitored as they cause unpleasant odors, making them subjects of analysis. This study aimed to develop a method that integrates the analysis techniques for VOCs and odor substances, which are typically conducted separately, to achieve high sample throughput. Solid-phase microextraction (SPME) Arrow is a particularly useful technique as it allows for sample pretreatment and sample introduction to be performed with a single device. Additionally, SPME Arrow can be automated using a rail-type autosampler, significantly reducing the time required for sample pretreatment. In this study, we proposed a method that efficiently measures VOCs and odor substances in drinking water by combining a simplified sample pretreatment workflow with headspace-solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS).

• Other laboratory equipment and containers

The goal was excellent performance! It has good extraction efficiency and enables the extraction and analysis of lower concentration components.

At Restek, we offer the SPME product "Restek PAL SPME Arrow." This groundbreaking product features high-speed extraction and trace-level extraction performance, along with excellent robustness. Compared to conventional SPME fibers, it allows for a larger liquid phase volume, enabling the extraction of more compounds in a shorter time. 【Features of Restek PAL SPME Arrow】 ■ Durable and robust stainless steel construction ■ More efficient sample throughput with shorter extraction times ■ High extraction efficiency, allowing for the extraction and analysis of lower concentration components ■ Suitable for a wide range of target compounds and sample matrices *For more details, please refer to the PDF document or feel free to contact us.

• Other inspection equipment and devices

The goal was excellent performance! Made of durable stainless steel with outstanding durability.

The "SMART PAL SPME Arrow System" is a groundbreaking product that combines high-speed extraction and trace-level extraction performance with excellent robustness. Compared to conventional SPME fibers, this product has a larger liquid phase volume, allowing for the extraction of more compounds in a shorter time. Its stainless steel construction, arrowhead-shaped tip, stable internal rod, and outer sheath structure minimize mechanical damage and loss of compounds during sample transfer, fully protecting the liquid phase. Additionally, it offers high extraction efficiency, enabling the extraction and analysis of lower concentration components. Please feel free to contact us for inquiries. 【Features】 ■ Durable and robust stainless steel construction ■ More efficient sample throughput with shorter extraction times ■ High extraction efficiency, enabling the extraction and analysis of lower concentration components ■ Equipped with SMART Technology *For more details, please refer to the PDF document or feel free to contact us. Restek Corporation

• Other physicochemical equipment

The fixed volume is large and the mechanical stability is high! Explanation of heating conditioning and solvent washing, etc.

This document is the instruction manual for the "Restek PAL SPME Arrow." It has several advantages over conventional SPME fibers in terms of having a larger stationary phase volume and higher mechanical stability. We provide detailed information on the selection of SPME Arrows and general precautions. Please take a moment to read it. 【Contents (partial)】 ■ Selection of SPME Arrow ■ Restek PAL SPME Arrow Conversion Kit ・ PAL System Compatibility ■ SPME Arrow Heating Conditioning and Solvent Washing ・ General Precautions ・ Heating Conditioning * For more details, please refer to the PDF document or feel free to contact us.

• Separation device
• Technical and Reference Books

We will introduce the selection of SPME Arrows and the appropriate conditioning procedures!

This document serves as the instruction manual for the "Restek PAL SPME Arrow." It provides detailed information on the appropriate selection of SPME Arrows based on the characteristics of the analyte, as well as heating conditioning and solvent washing. The content is presented alongside diagrams, making it easy to reference. We encourage you to read it and make use of it. [Contents] ■ Selection of SPME Arrows ■ Heating conditioning and solvent washing of SPME Arrows *For more details, please refer to the PDF document or feel free to contact us.

• Technical and Reference Books

The glass pot lid has a hydrophilic heat-resistant coating, allowing you to check the cooking state without any fogging.

"Because it's an invisible place, we won't overlook it." Japan's climate is characterized by high temperatures and humidity, and particularly after typhoons and heavy rains, the conditions can be harsh for homes. It's not just the roofs and exterior walls that are affected by rain and wind. The area beneath the floor is actually the most susceptible and often overlooked point. This time, we will explain the "checkpoints for under the floor" that should be confirmed after a typhoon or heavy rain, the "responses" if abnormalities are found, and measures for preventing recurrence. [Table of Contents] ■ Why is underfloor checking necessary? ■ Checkpoints to confirm after a typhoon or heavy rain ■ Responses when damage is discovered ■ Points for preventing recurrence ■ Suggestions from Seihou Products ■ Summary Please be sure to read the [related materials] and [related links]. ↓ ↓ ↓

Explosion-proof motors available in stock We will deliver within 7 days to meet your delivery schedule. 【What is an explosion-proof motor?】 In factories and plants, flammable gases and vapors are present. When these mix with air and come into contact with an ignition source, an explosion or fire can occur. This motor is designed with measures to eliminate such ignition sources. 【Available stock models】 ■ Pressure-resistant explosion-proof motors, explosion-proof grade d2G4 - Foot-mounted type, output 0.4 to 3.7 kW, 4 poles - Flange type, output 0.4 to 0.75 kW, 4 poles ■ Increased safety explosion-proof motors, explosion-proof grade eG3 - Foot-mounted type, output 0.2 to 0.75 kW, 2 and 4 poles - Flange type, output 0.2 to 0.75 kW, 2 and 4 poles

As part of the "Hometown Ibara Future Creation Human Resource Development Project," we welcomed local elementary and middle school students to the special summer program "Ibara Job Exploration Tour 2025," a collaboration between the Ibara City Chamber of Commerce and the Corporate Branding Committee. We conducted a presentation that clearly and enjoyably introduced how our technology supports society, allowing the children to learn about the appeal of manufacturing and the significance of working while interacting with actual devices and products. Through this initiative, we hope to deepen our connection with the community and nurture the curiosity of the children who will carry the future. We sincerely thank everyone who participated, as well as all those involved in planning and organizing the event.

We will disclose the interim financial results for the fiscal period ending December 2025.