Comprehensive Analysis of Sampling Bottles: A Guide to Materials, Classification, and Application Scenarios

 

Sampling bottles are core tools in fields such as laboratories, environmental monitoring, and chemical analysis, designed specifically for the safe storage and accurate collection of samples. This article will comprehensively analyze how to select and use sampling bottles from aspects such as materials, classification, production processes, and applicable scenarios to ensure the integrity of samples and the reliability of test results.

 

I. Material Selection: Precise Match with Experimental Requirements

1. Glass Material

Glass sampling bottles have excellent chemical stability and high - temperature resistance, and can withstand corrosive substances such as strong acids and alkalis. High - borosilicate glass materials with high transparency are commonly used in scenarios such as chromatographic analysis and pharmaceutical reagent storage. However, glass is fragile, and high - impact environments should be avoided.

 

2. Plastic Material

Plastic sampling bottles made of materials such as polypropylene (PP) are characterized by high impact resistance and are suitable for regular experiments and transportation. Their advantages of being lightweight and low - cost make them commonly used in fields such as environmental monitoring and water quality sampling. It should be noted that plastics have limited tolerance to some solvents, and selection should be based on chemical compatibility.

 

3. Metal Material

Materials such as stainless steel (e.g., 316L) or aluminum alloy are pressure - resistant and corrosion - resistant, suitable for high - temperature or gas sampling scenarios. For example, gas sampling steel cylinders can safely store media such as liquefied petroleum gas and butadiene, and are equipped with explosion - proof devices to ensure operational safety.

 

II. Classification Standards: Precise Classification by Volume and Purpose

1. Classification by Volume

- Small Capacity (1 - 100ml): Suitable for sampling trace liquids or gases. For example, a 10ml pressure - resistant glass bottle is used for petroleum gas detection.

- Medium Capacity (150 - 500ml): Such as a 150ml PP plastic bottle or a 250ml glass bottle, widely used in liquid particle size testing and reagent storage.

- Large Capacity (1000ml and above): Meets the needs of batch sampling, such as the storage of high - purity chemical reagents.

 

2. Classification by Function

- Sterile Bottles: Treated by high - temperature sterilization, suitable for microbial detection and the pharmaceutical field.

- Anti - pollution Bottles: Through special sealing designs, they reduce the interference of environmental impurities, such as the collection of particulate matter in environmental monitoring.

 

III. Production Process: Cleanliness and Standard Certification

High - quality sampling bottles need to comply with the international standard ISO3722. Their cleaning process includes ultrasonic purification, thousand - level clean air shower, and sealed packaging to ensure that the cleanliness reaches NAS1638 - 1 level. Such a process can completely eliminate residual pollutants on the inner wall of the container (such as the risk of unknown RCL values) and ensure the credibility of test results.

 

IV. Application Scenarios and Selection Suggestions

1. Environmental Monitoring

For water quality sampling, PP material bottles with strong sealing performance should be selected, and those with a scale design are convenient for quantification; for gas detection, pressure - resistant glass bottles with brass or stainless steel protective sleeves should be preferred.

 

2. Chemical Analysis

High - borosilicate glass bottles are recommended for highly corrosive reagents, while PP plastic bottles can be used for regular solvents. Chemical compatibility should be noted to avoid material swelling or the release of impurities.

 

3. Industrial Inspection

For high - pressure gases such as liquefied gas, 316L stainless steel cylinders should be used. Their pressure - resistant and explosion - proof designs comply with standards such as GB/T6012 to ensure sampling safety.

 

V. Usage and Maintenance Specifications

1. Avoid reusing non - dedicated containers to prevent cross - contamination.

2. Metal bottles need to be regularly inspected for seals and explosion - proof devices.

3. Glass and plastic bottles should be cleaned immediately after use and stored in a dry and dark environment.

 

Through scientific selection and standardized operation, sampling bottles can play a key role in fields such as medicine, scientific research, and industry, providing strong support for test