Medical Uses

Gold Colloids

TANAKA offers high-quality products with prompt and thorough support.

Through our own proprietary processes, we have been able to produce gold nano particles that enable diagnostics and biosensors to be manufactured, which we supply using a high quality management system.

Gold-Citric Acid Colloidal Solution

Features

  • Colloid solution in which nanosized gold particles are dispersed
  • Spherical gold particles with high-purity and a narrow particle size distribution
  • Easy to modify gold particle surfaces
  • Colloids can be supplied in the quantity and in the time required as they are manufactured in Japan
  • Colloids can be supplied at a stable level of quality with little variation between lots
15nm

15nm

30nm

30nm

40nm

40nm

50nm

50nm

80nm

80nm

100nm

100nm

Applications

Gold-citric acid colloidal solution is used in in-vitro diagnostic and other test kits.
It is ideal for use in test reagents, biomarkers, X-ray identification markers, etc.

Typical characteristics

Au colloid solution-SC
Particle size
(nm)
Solvent Color Shape Particle size range Gold content (Wt%) pH
5 Water Light orange
-
Dark red
Spherical shape 10% or less in relation to the particle size 0.004~0.005 4.5
15 0.006~0.007 5.5
20 5
30 4
40 3.5
50 3
60 3
80 3
100 3
150 3
Absorbance

Absorbance

Au particle size

Au particle size