DIY Biochemical Scanner From a Hacked CD Drive

holy_calamity writes "Turns out hacking two extra light sensors into a CD drive can turn it into a lab scanner to read the results of high-accuracy immunoassays used to detect disease markers or pathogens, New Scientist reports. The drive proved able to detect pesticides at concentrations as low as 0.02 micrograms per liter."

Comments

let me guess

[HalifaxRage]

Let me guess.... MacGyver happened to haev a paper clip and a rubber band beside the computer.

Biological samples

[LiquidCoooled]

I'm sure some people have already been using CD drives with biological samples smeared across the disks.

Mental note: never rent porn dvds.

Rooted

[Chyeld]

Sadly, the drive was later mistaken as a normal CD drive and one of the researchers attempted to play the collection of Sony CD's on it. Now the drive refuses to do anything, claiming the pesticides are patented and trademarked and detecting them would be a violation of someone's Intellectual Property.

No, not quite.

[Applekid]

From TFA:

However, Corran believes that the Spanish team's procedure needs to be developed further. "They still do part of the assay in a normal plate. Until the whole thing can be done on a CD it doesn't have a great technical advantage." Meaning there is no Hacked CD Drive Biochemical Scanner, there's a Hacked CD Drive component to a Biochemical Scanning System.

I'd be willing to give up my last 5.25" bay if I could use it to give me the secret cheeto powder recipe.

Re:No, not quite.

[jimstapleton]

Yes, but would you be willing to give up eating Cheetos to know the recipie?

Why so expensive?

[SQLServerBen]

The real question is, if the laboratory machines are using more or less the same technology as the CD drives, why do the actual lab machines cost so much more? From TFA, the machine this replaces costs 30-60k Euro, compared to 15 Euro for a generic CD drive.

Re:Missing the Point

[kebes]

The point is to reduce the overall cost of being capable of running the test, not in vastly increasing the efficiency of running a massive batch of tests this way. Certainly there's downstream potential for it...

Actually there is already research being done in that regard. Some research groups are experimenting with building microfluidic systems on compact-disks. The spinning of the disk generates a centrifugal force that acts as the 'pump' for the device, driving fluid through stages. You can even have special valves in your device, and by changing the rotation speed of the drive, you progressively move the fluid from stage to stage.

Then the CD laser can be used as a detection mechanism at different locations along the disk. Also you can obviously run multiple experiments at once, since as the disk spins the laser passes from one fluid channel to the next.

It's a rather cool idea to use commodity CD-drives for these high-tech assays. I'm not aware of a good review of these experiments, but here are two papers on this subject:
Siyi Lai, Shengnian Wang, Jun Luo, L. James Lee, Shang-Tian Yang, and Marc J. Madou "Design of a Compact Disk-like Microfluidic Platform for Enzyme-Linked Immunosorbent Assay" Analytical Chemistry, 76 (7), 1832 -1837, 2004. doi 10.1021/ac0348322

Horacio Kido, Miodrag Micic, David Smith, Jim Zoval, Jim Norton and Marc Madou "A novel, compact disk-like centrifugal microfluidics system for cell lysis and sample homogenization" Colloids and Surfaces B: Biointerfaces Volume 58, Issue 1, 1 July 2007, Pages 44-51 doi: doi:10.1016/j.colsurfb.2007.03.015