Tubes, Test, Color Comparison Tube, Kimble | DWK Life Sciences
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Tubes, Test, Color Comparison Tube, Kimble | DWK Life Sciences
Nessler Color Comparison Tubes
These Nessler tubes are ideal for color comparison.
- Shadowless bottom of each tube transmits undistorted light
- Rings and legend are durable white ceramic enamel which correspond with specific volumes of liquid
- C690-4 and C690-7 are unmatched
- C690-8 is supplied in matched sets of 6
- Graduated ring scale of any of the tubes within a matched set will not vary from that of any other tube within the set by more than 1.5mm for the 50mL and 2.0mm for the 100mL sizes
- Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements
- The 50mL size (W407-4, 5, 7) is specifically mentioned by the American Public Health Association in Standard Methods for the Examination of Water and Waste Water
AOCS Color Comparison Tube (C690-9)
Used to determine the color of refined vegetable oils such as cottonseed, corn and soybean oils, as well as tallows, greases, fatty acids, etc., with Wesson type tintometers (AOCS Method Cc 13b). Also used to determine the color of whole and refined tall oils with a Lovibond tintometer.
- Shadowless bottom transmits undistorted light
- Rings and legend are durable white ceramic enamel
- Rings are located at specific distances from the inside bottom of the tube
- For use with AOCS Method Cc 13b
- Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements