analytic standard for ethylene oxide

Discussions about sample preparation: extraction, cleanup, derivatization, etc.

5 posts Page 1 of 1
for ethylene oxide residual test, i need analytic standard for ethylene oxide.

Could you help me about producer company?

Best Regards
Hi

I found it best to buy pre-prepared standards in solution.

I used to buy it as a standard solution in sealed ampoules from

http://www.greyhoundchrom.com/search.as ... lene+oxide

or

http://www.sigmaaldrich.com/catalog/pro ... &region=GB

Originally, I used to make standards by dispensing from a lab cylinder of ethylene oxide but I found that it was far easier and safer and ultimately cheaper to use the pre-prepared standards

Cool the ampoule in the fridge before opening and further diluting to your required standard.

The analysis was for residual EO in ethoxylated non-ionic detergents

Regards

Ralph
Regards

Ralph
Hi

As additional comments

1. I used to favour, for economy, buying the 1000ppm standard and then diluting to my required level for standard addition analysis. The diluted standard I would then store in screw cap septum sealed 2ml autosampler vials in the freezer.

2. Ensure that your column/detector can resolve EO from acetaldehyde. which can give a false positive.

Regards

Ralph
Regards

Ralph
GOM wrote:
Hi

As additional comments

1. I used to favour, for economy, buying the 1000ppm standard and then diluting to my required level for standard addition analysis. The diluted standard I would then store in screw cap septum sealed 2ml autosampler vials in the freezer.

2. Ensure that your column/detector can resolve EO from acetaldehyde. which can give a false positive.

Regards

Ralph


Most of my work has been with volatile analysis, so we use the Mini-inert caps on 1-5ml reaction vials. The slide closure and septum will allow you to draw from the vial repeatedly without losing the volatile analytes. We also store the vials in a freezer as -18C when not in use.
The past is there to guide us into the future, not to dwell in.
That is a very useful comment and another way that I hadn't considered in my reply

I have also used these Mini-inert vials successfully

My use of of the 2ml autosampler vials were as a single use disposable standard for economy.. I could also have used 1ml vials.

Regards

Ralph
Regards

Ralph
5 posts Page 1 of 1

Who is online

In total there is 1 user online :: 0 registered, 0 hidden and 1 guest (based on users active over the past 5 minutes)
Most users ever online was 1117 on Mon Jan 31, 2022 2:50 pm

Users browsing this forum: No registered users and 1 guest

Latest Blog Posts from Separation Science

Separation Science offers free learning from the experts covering methods, applications, webinars, eSeminars, videos, tutorials for users of liquid chromatography, gas chromatography, mass spectrometry, sample preparation and related analytical techniques.

Subscribe to our eNewsletter with daily, weekly or monthly updates: Food & Beverage, Environmental, (Bio)Pharmaceutical, Bioclinical, Liquid Chromatography, Gas Chromatography and Mass Spectrometry.

Liquid Chromatography

Gas Chromatography

Mass Spectrometry