Hackers and tinkerers of HP5890II instruments help needed

[Gizmo]

If your curriculum ever enters the realm of food and flavors you could just have the column exit out to no detector and have a "sniff port" of sorts. There are expensive GCO detectors as well but for just a display or teaching situation you could tinker a bit and achieve something adequate.

[jryter]

I toured New Belgium Brewery and saw a sniff port. Thought it was awesome!

[GOM]

Hi

Gizmo's suggestion of a GC olefactometer modification is interesting and rather good.

I can supply some suggestions for adapting the GC for this

If there isn't an FID already in place it only requires drilling a small hole in the top right hand side of the oven under the lid and using a 0.53 mm id column with a thick film Innowax phase

And human detectors are quite cheap

Regards

Ralph

[jryter]

Hi

Gizmo's suggestion of a GC olefactometer modification is interesting and rather good.

I can supply some suggestions for adapting the GC for this

If there isn't an FID already in place it only requires drilling a small hole in the top right hand side of the oven under the lid and using a 0.53 mm id column with a thick film Innowax phase

And human detectors are quite cheap

Regards

Ralph

As of now there is a dead MS attached. Hopefully we can attach a FID if I can find one cheap. I have some old columns. I need to look at what we have. But I would love to here more.
Jarral

[KM-USA]

Hopefully we can attach a FID if I can find one cheap.
Jarral

I'll look at through my big box of 5890 parts by Monday, will let you know either here or though the E-mail you provided. I'd like to clear out all my 5890 stuff, need the space. And would be very reasonable.

[jryter]

I'll look at through my big box of 5890 parts by Monday, will let you know either here or though the E-mail you provided. I'd like to clear out all my 5890 stuff, need the space. And would be very reasonable.[/quote]

That would be great. And as Christmas is coming--a headspace analyzer also. Ha! thanks a heap.
Jarral

[GOM]

Hi

If you can get an FID to add then great.

You can follow up as a teaching aid using Gizmo's suggestion of an olefactometer by

1. Running a fragrance sample ( e.g. perfume or aftershave supplied by a student) with the flame lit to produce a chromatogram

2. Run the same sample again with the flame out and use the FID as a sniff port. Note the times of the eluted components detected by sniffing and back correlate to the chromatogram.

3. Use a wide bore thick film (1 micron) column to give peaks that are just a bit wider and allows for sniffing them successfully. If you use a narrow bore column then the peaks are too sharp and easily missed during sniffing.

Regards

Ralph

[jryter]

Hi

If you can get an FID to add then great.

You can follow up as a teaching aid using Gizmo's suggestion of an olefactometer by

1. Running a fragrance sample ( e.g. perfume or aftershave supplied by a student) with the flame lit to produce a chromatogram

2. Run the same sample again with the flame out and use the FID as a sniff port. Note the times of the eluted components detected by sniffing and back correlate to the chromatogram.

3. Use a wide bore thick film (1 micron) column to give peaks that are just a bit wider and allows for sniffing them successfully. If you use a narrow bore column then the peaks are too sharp and easily missed during sniffing.

Regards

Ralph

And without a FID you would just have column come out to sniff?

[KM-USA]

1. D'oh !!! Box of parts must be in my attic !!!

2. We had an olfactory port for a time, yes time consuming to use. We used a splitter and one could see the peak eluting on the chart. Best if one adds some moisture to the effluent, contact Gerstel for information.

[GOM]

Hi

And without a FID you would just have column come out to sniff?

Yes, if it just protrudes by a just a few mm the tip will be kept warm and reduce peak condensation problems.

There is a technique for sniffing the outlet that I developed for this design but we can go into that in more detail if you get that far, along with where to drill safely

I have built a few olefactometers and used commercial ones over many years with splitting to FID or MS as KM rightly suggests

Although it makes complete sense in theory, in my experience a humidifier adds complexity and doesn't actually offer much of a benefit - I have tried it with and without a humidifier and it didn't make any difference

For your student demonstration purposes I would say just keep it simple and just give it a try

Regards

Ralph

[KM-USA]

Hopefully we can attach a FID if I can find one cheap.
Jarral

I'll look at through my big box of 5890 parts by Monday, will let you know either here or though the E-mail you provided. I'd like to clear out all my 5890 stuff, need the space. And parts would be very reasonable.

OK, here's what I found in the attic. Make offer if interested. Christmas sale, I need the space.
82335 HPIB board
82341 HPIB board
82350 HPIB board
19232-60020 TCD board
19231-60010 FID board (two)
19257-80040 Board (two)
18594-B0170 Controller box board for ALS
5061-3302 Board CIB board (five)
K9260EU-01 Board
05890-60945 Oven flapper motor 5890 (new)

18597-60255 ALS tower mount (rare type that fits both “A” and “B” 7673 towers)
03380-60070 Print head for 1084, 5830, 5840 (new)
Oven fan blade 5890
Oven fan motor 5890
FID housing 5890
0-30 psi pressure gauge
FID/TCD gas valves/ignitor switch

19251-60560 Capillary split/splitless injection solenoid (new)
19257-60020
19246-60530 Controller
Oven heater and support 5890
05890-80300 Main board 5890
Oven flapper with motor 5890
19300-80710 Oven heater wire (new, two)
05890-60050 Board
Pressure controller 5890
Front keyboard and attached circuit board 5890
19362-60570 Gas controller (new)

[AICMM]

Ping me sometime when you have a moment. I am about to move into your area and would be more than happy to discuss 5890's.

AICMM at flash dot net.

Best regards,

AICMM

[GOM]

Hi AICMM

At whom are you directing your post? jryter - the original poster?



Kind regards

Ralph

[AICMM]

Yes, the post was directed to JRyter.

I am now up in CO.

Best regards,

AICMM