MADCAD.com - The Cloud-Based Reference Library

- Free Trial - Webinar - Feedback

Cart (0)

No items in cart.

Total

There is a technical issue about last added item. You can click "Report to us" button to let us know and we resolve the issue and return back to you or you can continue without last item via click to continue button.

Home

Content

eLibrary

Not a subscriber? Register for a trial account.

Username:
Password:

Incorrect username/password.

Already a subscriber?

MADCAD.com Free Trial

Sign up for a 3 day free trial to explore the MADCAD.com interface, PLUS access the
2009 International Building Code to see how it all works.

If you like to setup a quick demo, let us know at support@madcad.com
or +1 800.798.9296 and we will be happy to schedule a webinar for you.

Email *
Password *
Confirm *
First Name *
Last Name *
Title
Company Name *
Company Size *
Industry *
Address *
Address 2
City *
State *	Zip *
Country *
Phone *
How did you hear about MADCAD.com? *

Print page(s), starting from page (current page)

Continue to Print

Reset password

Enter your personal account email address to request
a password reset:

Reset password

Enter your account email address to request
a password reset:

Save As:

Are you sure you want to delete this group?

Security check

Please check the following box:

Please login to your personal account to use this feature.

Email:

Password:

Forgot your password?

Remember me for one month

Need a login? Register now.

Please login to your authorized staff account to use this feature.

Username:

Password:

Are you sure you want to empty the cart?

There were no books found for the applied search filters.

CLICK TO START OVER

Report To Us

Please fill the form below so that we can contact you.

Full name*
Email*
Phone

Contact us for a custom quote

Please fill the form below and a member of our staff will contact you shortly. The contents of your cart will automatically be sent to us so we can provide an accurate custom quote.

Company*
Full name*
Email*
Phone

⨯To continue with accurate pricing,
please select your company type below:

Large goverment organizations

Large multi-national corporation (more than $5B annual revenue)

None of the above

Your company has a special pricing case for IEEE.
For pricing, please contact us by filling out the form.

Full name*
Email*
Phone
Your selection

⨯We need your input!

Are you a code official in a jurisdiction with less than 300,000 population?

Yes No

This item is only available for the code officials of jurisdictions less then 300K population.

If you do not meet the criteria item will be removed and you will be able to continue shopping other items.

⨯ We need your input!

Your company has a special pricing case for ASME.
Please make sure the information you provide below is accurate.

Company Industry
Number Of Employees
Revenue

Pricing for the ASME publications in the store is for a 1-4 employee company in Construction Industry with revenue under $500,000.
If correct company info does not match what is publicly available info we will suspend the access and contact you for correction.
Please call 1-800-798-9296 if you have any questions.
If your company has more than 5,000 employee or more than 500 mil revenue please email us at info@madcad.com to receive a special quote, use "ASME Quote" on the subject line.

Cart Warning

eLibrary > BS ISO 20631:2024 Infant formula and adult nutritionals. Determination of total folate content by trienzyme extraction and ultra high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS) >

BS ISO 20631:2024 Infant formula and adult nutritionals. Determination of total folate content by trienzyme extraction and ultra high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS), 2024

BS ISO 20631:2024 Infant formula and adult nutritionals. Determination of total folate content by trienzyme extraction and ultra high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS), 2024

undefined
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials [Go to Page]
5.1 List of reagents
5.2 Preparation of solvent for standard solutions
5.3 Preparation of folate standard solutions
5.4 Preparation of folate internal standard stock solutions
5.5 Preparation of calibration standard solutions
5.6 Preparation of substrate solution to test plasma conjugase activity
5.7 Reagent for folate analysis
6 Apparatus
7 Procedure [Go to Page]
7.1 Sample preparation [Go to Page]
7.1.1 Sample processing to make them homogenous
7.1.2 Reconstitution of powder sample into liquid
7.2 Extraction
7.3 Extract purification
7.4 Instrumental analysis [Go to Page]
7.4.1 Analysis of instrument blank, calibration standards, method blank and samples
7.4.2 UHPLC conditions and MS parameters for different systems
8 Calculations [Go to Page]
8.1 Calculation of ratios of peak areas of the folate compounds to the respective internal standard peak areas
8.2 Calibration curve
8.3 Calculation of concentration of folate compounds in the method blank
8.4 Calculation of concentration of folate compounds in the sample extracts
8.5 Calculation of folate compounds and total folate in reconstituted or RTF samples (μg/100 g)
8.6 Calculation of total folate in powder samples (μg/100 g) as-is basis
8.7 Calculation of folic acid nanograms released in the conjugase test
8.8 Calculation of per cent conversion of Pte-Glu3 to folic acid in the conjugase assay
9 Precision [Go to Page]
9.1 General
9.2 Repeatability
9.3 Reproducibility
Annex A (informative) Precision data
Bibliography [Go to Page]

About Us / Careers / support@madcad.com / 1.800.798.9296

MADCAD.com Free Trial

Report To Us

Contact us for a custom quote

⨯To continue with accurate pricing, please select your company type below:

⨯We need your input!

⨯ We need your input!

Cart Warning

BS ISO 20631:2024 Infant formula and adult nutritionals. Determination of total folate content by trienzyme extraction and ultra high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS), 2024

⨯To continue with accurate pricing,
please select your company type below: