Disposable Weighing Boat

What is the Disposable Weighing Boat?

A disposable weighing boat is a light plastic tray for weighing and transferring powders and liquids. It avoids cleaning, cross contamination and static cling between samples. Antistatic versions suit fine powders and small weights.

Overview

The boat is moulded from polystyrene, polypropylene or antistatic polystyrene, in capacities of 5–250 mL, with a flexible side that makes pouring easy. Antistatic versions reduce static cling so fine powders do not stick to the surfaces and the sample transfers completely, which matters at milligram weights. The boat is placed on the balance, tared, filled and then transferred to the vessel, and it is discarded afterwards, saving cleaning and reducing cross contamination between samples. Smooth or slightly textured surfaces are available, and some boats fit into a standard balance chamber. They are not suitable for hot samples, for strong solvents that would dissolve polystyrene, or for accurate weighing when static is high, where an antistatic or metal boat is better.

How does it work?

Plasticware works because polymers can be moulded into precise, low-cost shapes and selected for specific properties. Polypropylene resists most acids, bases and solvents, tolerates autoclaving and is translucent but not optically clear, so it is used for beakers, bottles and carboys. Polycarbonate is clear and tough, so it is used for centrifuge bottles where the contents must be seen and the vessel must resist high g forces. Polystyrene is optically clear and rigid, which suits cell culture flasks and dishes, and is supplied sterile and sometimes treated for cell attachment. Polyethylene is flexible and used for wash bottles and tubing. Unlike glass, plastics can adsorb analytes, leach additives such as plasticisers, and scratch, so they are chosen for applications where inertness requirements are lower or where disposability reduces contamination risk.

What are the key features?

• Polystyrene, PP or antistatic PS
• Capacities 5–250 mL
• Flexible side for pouring
• Static-dissipative option
• Fits balance chamber
• Single use, no cleaning

What are the technical specifications?

A typical disposable weighing boat configuration offers material of PS, PP or antistatic PS, capacity range of 5–250 mL, antistatic of Option available, shape of Flat with flexible side, balance fit of Standard chamber and weight of 2–10 g. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Disposable Weighing Boat is used in powder weighing, standard preparation, sample transfer and teaching laboratories. Across the wider Plasticware class, laboratories also deploy it for reagent and buffer storage, cell culture and microbiology and centrifugation.

Which standards and certifications apply?

Relevant standards and methods include USP <661> (plastic components and systems), USP <88> (biological reactivity tests), ISO 10993 (biological evaluation of medical devices), ISO 13485 (medical device quality management), EN ISO 11607 (packaging for terminally sterilized devices) and ISO 11737 (sterilization of health care products). Certification candidates for this model are CE and ISO 9001 manufacturing; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Confirm the maximum temperature and autoclave compatibility of each polymer before use, since polypropylene tolerates about 121 °C and polystyrene does not. Avoid strong oxidising acids and solvents that cause environmental stress cracking, and test new polymer and chemical combinations before routine use. Use sterile techniques with culture ware and keep packaging intact until use, and do not reuse items intended for single use. Inspect bottles for crazing, cloudiness or odour, which can indicate chemical attack or leaching. Store plastics away from direct sunlight and heat, and keep certificates of analysis and sterility for regulated work. Where adsorption matters, run recovery checks with the analytes and the intended plastic before committing to a method.

How do I select the right Disposable Weighing Boat?

Choose antistatic boats for fine powders and milligram weighing, and check solvent compatibility. RFQ: capacity, antistatic need, material and balance type. Confirm the capacity, material and whether antistatic behaviour is needed. State the balance model and sample type.

How does it compare with other Plasticware variants?

Choose the polymer from the chemistry, the temperature and the visibility needed. Polypropylene is the general-purpose choice for acids, bases and most solvents, and it can be autoclaved. Use polycarbonate where clarity and impact strength matter, but avoid it with strong alkalis and some solvents that cause stress cracking. Use polystyrene only for aqueous and culture work, since it is attacked by many solvents. Choose sterile, pyrogen-free and cell-culture-treated grades where cells, media or clinical samples are involved, and confirm the certification. Match the volume, closure and centrifuge rating to the application, and check that the resin does not adsorb the analytes of interest. For trace work, ask for leachables and extractables data, and prefer low-binding surfaces for proteins and peptides.