International Life Sciences Crop Composition Database
Data Acceptance Criteria
To ensure that data accepted into the ILSI Crop Composition Database are of high quality, certain criteria must be met. Representative plant samples must be obtained from field-grown crops in which the production locations and dates are known. Sample collection must be done in a way that maintains the integrity of the sample throughout the analytical process, and analytical methods used in the generation of the data must be validated and in the published literature. Please use the checklist below to indicate that your data adhere to the criteria regarding production, sample collection, sample analysis, data, auditing, and archiving and submission of data.
Production of Samples Criteria:
The following information must be known about the field trials in which the samples were produced:
- Location of the plot. Region and Country must be reported.
- Year of sample collection. Harvest year must be reported.
- Date of planting must be known, although it is not submitted as part of the data.
- Reporting of seed variety is optional.
- Crop development method must be reported (transgenic or non-transgenic).†
Sample Collection Criteria:
- Samples may be collected from hand-pollinated or open-pollinated plants.
- Each sample must be a composite sample collected from representative plants from one plot of a controlled field trial at a single location, similar to the practice employed for pesticide residue trials. If samples are from a bulk grain production from a large plot, appropriate methods must be used to ensure that a representative sample is collected.
- Whole grain or seed samples may be stored at ambient temperature. Sweet corn samples, and any material that is ground, must be stored frozen until analyzed.
- Samples that are oven dried must be identified as such.
- The complete chain of custody of the samples from harvest to analysis, and the storage conditions of the sample, must be known, but are not submitted as part of the data.
Sample Analysis Criteria:
- Samples must be analyzed within 12 months of collection.
- Analyses should be conducted by accredited/certified laboratories, or laboratories experienced with the specific analytical methodology.
- Analyses must be conducted using validated methods using certified or historically verified standards, and the method of analysis must be indicated. Standard compendial methods such as those published by Association of Analytical Communities (AOAC), American Association of Cereal Chemists (AACC), American Oil Chemistsí Society (AOCS), International Organization for Standardization (ISO), and United States Pharmacopeia (USP) are considered to be validated. A validated method may also be one that is published and has undergone sufficient testing to ensure the quality, reliability, and consistency of results through the determination of specificity, accuracy, precision, linearity, and robustness. The analytical method must be reported using established internal database method codes shown in the ILSI Crop Composition Database Method Listing.
- Results for each analyte must be reported in the same chemical form in order to ensure that meaningful comparison can be made (e.g. thiamine vs. thiamine hydrochloride). Values for chemical forms of an analyte not already included in the database may be considered for inclusion in later versions of the database but must be defined as a separate analyte. The analyte name must be reported in the ILSI Crop Composition Database standardized format.
- All submitted data must be derived from the analysis of a single composite sample. Data based on averaging of values from multiple samples will not be accepted. A single analytical result for each composite sample must be reported.
- Prior to submission, the data provider must perform quality control checks on the analytical data.
- Unit of measure must be reported. Whenever possible, data should be submitted in a unit of measure currently in use for the corresponding crop and analyte. Although the database is designed to perform unit conversion, unusual units of measure may not be accepted.
- The data submitter must retain the records and data after submission to the database.
- Prior to publication, ILSI will perform an outlier test on all submitted data. Any potential outliers must be evaluated and verified by the data provider.
Auditing and Archiving of the Data:
- ILSI reserves the right to confidentially audit datasets at the originating organization (at ILSI's expense) to ensure that the requisite raw data are available. The submitter agrees to archive the raw data from which the submitted data were derived. If a data point is questioned and the validity of the data cannot be confirmed, ILSI reserves the right to delete the data point from the database.
Submission of Data:
- Data must be submitted as comma-delimited in a defined format, available upon request. Institutions and organizations interested in submitting data to the database may contact ILSI to determine if their data meets the criteria for submission.
For further information about the database and data submission, contact CCDB@ilsi.org.