Janet M. Roseland , Judith H. Spungen2, Kristine Y. Patterson1,

Overview

This source page is a mechanical bulk-ingest record for a PDF in the research-pulls corpus. It preserves source-level identity, routeable product/analyte scope, and exact extracted numeric lines for later human or fresh-context audit. It does not derive HMTc thresholds, percentiles, or brand-by-brand comparisons.

Key numbers

The worker extracted the full PDF text with layout preservation twice and compared extraction hashes before commit. The following lines are copied from numeric/table-bearing regions of the PDF and retain the source units and wording where legible:

• 2014, confirmed the need for food composition tables on iodine content (Swanson et al., 2012; Ershow et
• nationwide (Pehrsson et al., 2016; Ershow et al., 2016; USDA, 2017). These have included notable dietary
• quantitation (LOQ) for the analyses was 10 mcg/100g of iodine for most of the foods and 50 mcg/100g for
• use for iodine analysis since 2016 has limits of detection (LODs) and LOQs that are lower (i.e., better) than
• described above. Convenience samples of 5 different brands of shelf stable soy beverage and 6 different
• information on variability. For the FDA national samples (n=1) and for the milk, egg and salt data reported
• FDA’s results for foods below the LOD are shown as zero (0), with values between the LOD and LOQ
• generally considered very bioavailable (easily absorbed), as high as 99% (Gonzali et al., 2017). The iodine
• U.S. Department of Agriculture (USDA), Agricultural Research Service (ARS). (2007). USDA Table of
• 19 02047 909 Salt, table, iodized 25 5070 1120 3410 7430 FDA/USDA
• 279 732 Baby food, macaroni and cheese with vegetables 7 5.9 0.8 4.2 6.4 FDA
• 210 14091 503 Beverage, almond, shelf stable 7 0.3 0.3 0.09 0.9 FDA/USDA
• 19 02047 909 Salt, table, iodized 1/4 tsp 1.5 76.1 25 16.8 51.2 111.5 FDA/USD FDA, USDA
• 210 14091 503 Beverage, almond, shelf stable 1 cup 262 0.9 7 0.8 0.2 2.4 FDA/USD USDA

Methods (brief)

• preparation of the USDA samples.
• The FDA collects about 270 kinds of food and beverage samples regionally as part of its Total Diet Study
• (TDS), and analyzes these samples for nutrient elements, including iodine. These data can be found on-line
• (FDA, 2020). The TDS program began in 1961, and analysis of TDS samples for iodine began in 1973.
• spectrometry (ICP-MS). The USDA samples were solubilized using a strong base, a stabilizer was added
• quantitation (LOQ) for the analyses was 10 mcg/100g of iodine for most of the foods and 50 mcg/100g for
• the salt samples. FDA solubilized TDS samples using tetramethyl-ammonium hydroxide, and a hot block
• detection (LOD) for iodine ranges from 0.01-0.04 mcg/100g, and the LOQ ranges from 0.1 – 0.5 mcg/100
• Quality control materials used for analysis of the USDA samples included certified standard reference
• analyses. All the data, from the reference materials as well as the samples, were examined either by the
• Source and handling of samples: USDA
• Many of the samples analyzed by USDA came from the National Food and Nutrient Analysis Program
• (NFNAP), which has been in progress since 1999 (Haytowitz and Pehrsson, 2018). The foods collected
• eggs, salt, almond beverage, and soy beverage, described below, samples from more than one location were
• Where appropriate, the samples were processed with liquid nitrogen, frozen and sent out for analysis with
• additional aliquots of the food samples stored long-term at -60°C. It was determined that iodine in the
• samples remains stable under such conditions, by having five samples with different matrices sent for
• iodine analysis and five years later analyzing aliquots of the same samples. The results did not show any

Implications

This page makes the source discoverable for category-level evidence routing. Values remain source-native and should be used only with the stated matrix, species, basis, geography, and censoring context from the paper. The page does not convert total mercury to methylmercury or use total arsenic as inorganic arsenic.

Wiki pages this source may touch

• Infant Formula Powder
• Fish — marine, predatory (tuna, swordfish, shark, king mackerel)
• Fish — marine, non-predatory (sardines, anchovies, salmon, cod)
• Shellfish (shrimp, crab, lobster, clams, oysters, mussels)
• Root-Vegetable Purees
• teething-and-snacks
• Seaweed/kelp foods (nori, wakame, kombu, dulse — as food products)
• Arsenic
• Nickel
• Chromium

Verification notes

• Identity check: DOI, raw handle, candidate cite-key, and SHA-256 were compared against existing wiki/sources/ pages before creation.
• Full-PDF read: pdftotext -layout was run on the full PDF twice; extracted text hashes matched before the page was written.
• Numeric verification: numeric/table-bearing lines were selected mechanically from the verified extraction and preserved without unit conversion or rounding.
• Brand firewall: the worker skips PDFs when extracted numeric lines appear brand/manufacturer-sensitive; this page contains category-level or species-level evidence only.
• HMTc firewall: no threshold, percentile, pass/fail, clean/dirty, or certification math is stated.

Update history

The five most recent substantive edits to this page, classified major (evidence or structure moved), correction (a published value or statement was wrong and has been fixed), or minor (narrative rewritten without changing the underlying evidence). Each description is derived from what the edit did to this page; the linked commit is the authoritative record, routine regeneration passes are excluded, and the full version history lives in git. When DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.