Accelerator mass spectrometry of 10Be, 14C, 26Al, 36Cl, 41Ca, 129I



PRIME Lab is funded by the National Science Foundation.
 

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Title: SAMPLE CHAIN OF CUSTODY
Classification: ams.source.sample_chainCustody
Key words: chain custody, sample, database
Intended readers: loader, chemist, operator, curator
Maintainer: Marc Caffee (to whom changes and suggestions should be sent)
Revision history: 1. 07-Jan-04 based on plid.doc
2. 02-Feb-13 change the sample wheel and left material discard


Chain of Custody is a legal term that refers to the ability to guarantee the identity and integrity of the sample from collection through AMS measurement to billings. It is a process used to maintain and document the chronological history and critical data of the samples, and to ensure that the sample has been in possession of, or secured by, and treated by a responsible person at all times.

Sample Management System, as Rose in short, is a tool to perform the chain of custody in PRIME Lab. Rose is based on the client/server model and PostgreSQL, an advanced open-source object-relational database management system (ORDBMS) shown below

The sample related data are stored in Rose. The database administrator must keep the database run smoothly to ensure the data traceable and countable at any time to meet the requests from submitters and AMS operations.

  1. Common aspects of a chain-of-custody requested from submitters

    1. Sign "Sample Submission Agreement" at first time of submission
    2. The mailing address, e-mail and phone number of the scientific investigator, contact person and administrator,
    3. The short description of the sample related project, including: title, funding agency, grant number if funded by NSF, research field.
    4. The list of isotopes (10Be, 14C, 26Al, 36Cl, 129I) requested for isotope abundance measurement and the desired measurement precision
    5. The list of the samples: including type (rock, sediment, water, etc), the unique sample identification assigned by sample submitter (USERID), short sample description, weight, pretreatment history, and special treatment requests.
    6. The purchase order number if available
    7. request PRIME Lab for holders if target is done by submitter
    8. load targets into holders following PRIME Lab sample loading procedure
    9. The list of sample names and corresponded holder numbers
    10. Enter sample related data into ROSE via AMS Sample Management System

  2. Common aspects of a chain-of-custody requested from PRIME Lab

    1. Sample Arrival: PRIME Lab curator shall check the sample package, run VB program "rptBatchNewPlid" to inform submitter on sample arrival with sample PRIMELab ID as well as estimated charges (see attachment 1); deliver the samples to chemistry group if requested for target preparation with sample list and submitter contact information (see attachment 2 by "queryPhyChem"by "queryPhyChem"); store loaded holders in dedicated dryer if samples requested only for AMS.
    2. Durding target preparation, the person in charge physical treatment shall record the physical treatment procedures, date started and ended into ROSE; deliver the pretreated samples to the chemist with attach the physical treatment reports (see attachment 3)
    3. Chemist shall produce target material and load it in holder; record in Rose the procedures of chemical treatment, weight of aliquot, added carrier, target, and the holder ID, the date of chemistry started, ended, loaded; store the loaded holders in dedicated dryer and inform the curator (see attachment 4 by "queryHolderByChm")
    4. Making AMS run wheels: Curator run VB wheel making program to produce list of run wheels (see attachment 5). Each wheel holds 50 unknown samples (in position 1-50), 8 standards in position (57-64), blank (56), 3-5 QAs (51-55). the printed lists of wheels are kept in logbook, the holders are in wheel boxes. Operator shall put holders on wheel according to the order in wheel list. after AMS, operator shall put holders back to the wheel box in order.
    5. AMS Report: PRIME Lab DAQ store detailed measurements into Rose. Curator shall run VB data analysis program to generate AMS reports and email to submitters(see attachment 6). Submitters can download the AMS results from ROSE too
    6. Curator shall run VB billing program to generate charge statements (see attachment 8), cover letters (see attachment 7), AMS results (see attachment 6) in PDFs to deliver as official reports to submitters; the VB billing program also generate the list of billing requests for Purdue Business Office to issue invoices to submitters.

  3. Left material Handling:
    1. Six months after the AMS measurements have been completed, curator shall contact PURDUE REM to dispose of the measured, loaded holders.
    2. PRIME Lab will not send measured loaded holders back to submitters.



RECORD OF TRAINING: I have read this documentation and I understand it. I have had the opportunity to obtain answers to questions on any points that were confusing to me. I will mark changes on the above documentation if I regularly deviate from the written procedure for whatever reason

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email your suggestions to Marc Caffee