16mm COD Digestion Test Tube
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    16mm COD Digestion Test Tube

    name: 16mm glass COD test tube/ COD digestion test tube
    material: high borosilicate glass
    Bottom: round bottom/ flat bottom
    size: 16*100mm/16*90mm/16*125mm/16*150mm
    Scope of application: COD test for laboratory, chemical plant, etc
    product description


    Aijiren COD Test Tube is made of borosilicate glass, which can reduce pH changes and pollutants that may be leached from soda lime glass. 

    The glass digestion test tube can be used for analysis at temperatures higher than 130 degrees Celsius. 

    It is manufactured from laboratory storage for a variety of general purposes and can hold almost anything.

    The gasket is made of PTFE silicon rubber gasket, which has strong sealing performance and can resist various chemical corrosion.

    COD Test Tube is small in size and light in weight. It can be tested without any other laboratory equipment and technicians; it only takes 3-5 minutes to test a sample, without additional materials or instruments, and is easy to operate.

    Suitable for colorimeters and test kits on the market

    Also suitable for instruments and test kits

    Easy-to-open sealed vials eliminate the risk of cross-contamination

    Extend the shelf life to five years

    Used for municipal wastewater testing; industrial wastewater and process control testing; environmental water testing

    The used COD Tubetests contain strong sulfuric acid and other chemicals, so reagents must be handled carefully. The contents of the pipe should be disposed of in accordance with the requirements of local authorities.

    These test tubes are SGC certified. These tubes can only be used once, so they cannot be reused.

    With the Aijiren COD tube test, each user can easily perform highly sensitive and accurate water detection.

    The time required for the measurement process is significantly shortened, especially for standard analysis and series measurement, while significantly reducing the workload.

    The COD Test tube contains a precise dose of reagent. Therefore, excessive chemical inventory is avoided and work safety is improved.

    The product is used in various domestic or imported brand digesters, such as Hach in the United States. 

    There are a variety of specifications to choose from, which can provide customized services for water quality analyzer manufacturers, and can print LOGO and write upon request.


    Product Name

    16mm glass COD test tube/ COD digestion test tube


    USP Type I, Borosilicate glass


    9ml, 10ml, 12ml, 15ml

    Vial Size


    Vial Color


    Cap Choices

    pp cap available

    Neck Diameter


    Scope of application  COD test for laboratory, chemical plant, etc.


    100pcs/pp box


    Aijiren clear water digestion colorimetric test tube has a 16mm threaded opening. 

    There are various specifications, 9ml, 10ml, 12ml, 15ml. 

    It is compatible with imported digestion test tubes. 

    It can be assembled with bottle cap and septum. It can be used immediately to save your time. 

    The precise bottleneck size ensures correct handling and strict quality control. Ensure dimensional consistency between batches.

    The default is 25 pcs/foam box. If you need 100 pcs/carton, please contact the product manager.

    About COD Test

    Chemical oxygen demand is a vital test for assessing the quality of effluents and waste waters prior to discharge. 

    The Chemical Oxygen Demand (COD) test predicts the oxygen requirement of the effluent and is used for monitoring and control of discharges, and for assessing treatment plant performance. 

    The impact of an effluent or waste water discharge on the receiving water is predicted by its oxygen demand. This is because the removal of oxygen from the natural water reduces its ability to sustain aquatic life. 

    The COD test is therefore performed as routine in laboratories of water utilities and industrial companies.

    The Chemical Oxygen Demand (COD) test is widely used as a measure of organic contamination by determining the quantity of oxygen required for oxidation of reduced species including organic matter, in a water sample using a specific oxidizing agent, temperature and time reduction. 

    COD testing is a good better indicator of organic pollutants in industrial wastewater containing cyanides and heavy metals. COD testing affords rapid response to changing conditions before critical problems develop. 

    Related Service

    1) OEM Manufacturing welcome: Customized Logo, Customized Package

    2) Professional After-sales Service Team

    3) Fast delivery, all goods can be shipped in 3-7days. Large qty products are in stock for customer.

    4) Shipping way: Based on customer’s difference situation using difference shipping ways, By air, By sea, By train,etc.

    5) Aijiren is the one in China that equipped with complete molds of closed top screw cap. For septa, we have PE septa, PE/Alu Foil Septa PTFE/Silicone septa.

    Company Introduction

    Founded in 2007, Zhejiang Aijiren, Inc. specialized in chromatography consumables, such as autosampler vial for HPLC, headspace vial, GC vials, micro inserts, septa and caps, syringe filter, etc. 

    covers more than 10000 square meters, and has clean workshop more than 2000 square meters. 100, 000 class cleaning room;  

    15 years export experience, exprot to more than 70 countries, 2000+ customs around the world; 

    IS0, GMP & Bureau Veritas certificated, this is how we keep good quality and competitive prices for global valued customers. 

    Aijiren has own R&D Center and Quality Controll Center to keep products in high quality.

    More than 10 years experience for automatic analytica technique

    Passed ISO9001:2015  quality management system certification, RoHS compliance can also be provided.



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