Platinum Loop
Product Code : SCL-CLE-11935
Quick Answer: The Platinum Loop is an inoculation loop of 90:10 platinum-iridium alloy for microbiology and flame tests, made with loop diameters of 1, 2, 3, 4 and 5 mm. It heats quickly, cools in 3–5 seconds and does not oxidise.
Last updated: 18 October 2026
Key Features
- Platinum-iridium wire (90% Pt, 10% Ir) resists oxidation, so it does not pit or corrode with repeated flame sterilisation.
- Cools in 3–5 seconds after flaming.
- Keeps its loop shape at 1000 °C and above.
- Adds no colour of its own to the flame, unlike a nichrome loop, which can give a slight yellow-orange flicker.
- Fits a standard 6 mm handle.
Technical Specifications
| Specification | Value |
|---|---|
| Material | Platinum-iridium alloy, 90:10 |
| Loop diameters | 1, 2, 3, 4, 5 mm |
| Cooling time | 3–5 seconds |
| Handle interface | Standard 6 mm |
| Heat resistance | Holds loop shape at 1000 °C and above |
| Chemical resistance | Inert to most acids and alkalis |
How It Is Used
In microbiology the loop is flamed to sterilise it, allowed to cool briefly and then used to transfer and streak cultures. For flame tests it carries a little of the substance into the flame, and because the alloy causes no flame interference the colour seen comes from the sample.
Frequently Asked Questions
How does the Platinum Loop compare with a nichrome loop?
It cools in 3–5 seconds against 5–10 seconds for nichrome, does not scale or pit, and causes no flame interference, while nichrome can give a slight yellow-orange flicker.
What loop sizes are available for the Platinum Loop?
Loop diameters of 1, 2, 3, 4 and 5 mm.
Related Chemistry Lab Equipment
See the full chemistry lab equipment range, or these related flame test and microbiology items:
- Spirit Lamp
- Bunsen Burner with Stop Cock (Pack of 2)
- Flame Test Of Chemicals Lab Investigation
- Petri Dish
- Introductory Microbiology Kit
For a quotation on the Platinum Loop, contact JLab India on +91-8569909696.