Overview
This source page is a mechanical bulk-ingest record for a PDF in the methylmercury infant-formula research pull. 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:
- See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/257819878
- Article in Journal of Analytical Atomic Spectrometry · December 2013
- letting you access and read them immediately. Retrieved on: 27 June 2016
- Swiss Federal Laboratories for Materials Testing and Research EMPA, 9014 St.Gallen,
- Swiss Federal Dairy Research Station FAM, 3003 Berne, Switzerland
- Swiss Federal Office of Public Health BAG, 3003 Berne, Switzerland
- First published as an Advance Article on the web 1st December 2003
- for krypton (83Kr, 82Kr) and rubidium (85Rb) were measured to correct for interferences with the Sr isotopes
- 84, 86 and 87. These and further (argide) spectral interferences causing bias effects to the Sr isotope abundance
- uncertainty of the isotopic abundance ratio, resulting in a value of 0.016%. Comparison of the measured
- Sr/86Sr data with thermal ionisation mass spectrometric (TIMS) results, determined on the same cheese
- respect to the Sr isotope abundance values. The 87Sr/86Sr isotope abundance ratios in cheese originating from
- Sr, 87Sr, 86Sr and 84Sr. Natural variations of the isotopic several methods should be combined using multivariate
- composition of 87Sr/86Sr mainly arise from the natural b-decay statistical analysis in order to achieve a good differentiation
- of 87Rb to 87Sr (t½ ~ 4.88 6 1010 a). The Sr–Rb system has of cheeses from various geographic origins.
- geochronological purposes. The 87Sr/86Sr isotope abundance of the raw cheese products. Values of Sr isotope abundance
- a range of 82.29–82.75% for 88Sr, 6.94–7.14% for 87Sr, 9.75– themselves influenced by bedrock, soil water properties and
- 9.99% for 86Sr and 0.55–0.58% for 84Sr, respectively.1 Some atmospheric inputs.7,8 The typical strontium mass content of
- exceptional specimens are known in which the element has an mobile strontium in soil and in solution ranges from 0.2 to
- isotopic composition outside the reported range. Sr behaves 20 mg kg21 (mg Sr leached per g of soil).9,10 For different types
- similar chemical properties. The mass ratio of Sr/Ca is in the from 1 up to 2000 mg kg21 and from 0.01 to 7620 mg L21 for
- range of approximately 2.5 6 1024. hydrological samples (sea-water, rivers, rain …) and from 8 to
- Food authenticity is one aspect which is receiving more 2500 mg kg21 for biological samples (wood, roots …).
- analytical methods have to be validated2–6 for the prevention of topes.11 Sillen et al.12 investigated the possible shift of the
- parameters have been evaluated for the purpose of Emmentaler differences of up to 0.5% in the composition of 87Sr/86Sr
- This journal is ß The Royal Society of Chemistry 2004 J. Anal. At. Spectrom., 2004, 19, 227–234 227
- Table 1 Possible interferences for Sr isotopes and approximative mass resolving power m=Dm needed for the separation of the signals (10% valley
- Cr36Ar1 w10 000
- components, differential weathering of highly radiogenic rocks Table 2 Origin of ‘‘Emmental’’ type cheese samples used for Sr
- cows are kept under a controlled dietary regime and are not fed Bretagne BR1 Yffiniac 52 16.02.2001
- with industrially produced feeds or feeds from geographically Bretagne BR3 St Méen-le-Grand 100 16.02.2001
- products with other Ca and Sr containing sources could Berne BE3 Amsoldingen 644 26.12.2000
- St-Gall SG1 Schänis 750 26.12.2000
- then provide a shift in the Sr isotope ratios and lead to St-Gall SG3 Altnau 450 26.12.2000
- precision isotope ratios as long as the influencing parameters Savoie SA1 Massingy 537 08.02.2001
- are understood and under control. Typical internal precisions Savoie SA3 Avraissieux 540 08.02.2001
- for 87Sr/86Sr are in a range of 0.001–0.002%.13–15 Various French Jura TR1 Trevillier 800 11.06.2002
- abundance ratio by MC-ICP-MS. The main factors are Salzburg SAL105 Unknown — 15.10.2002
- believed to be isobaric and molecular interferences such as Allgäu AL1 Unknown 760 20.12.2000
- Rb1, 44Ca40Ar1, 48Ca40Ar1 and doubly charged rare earth Allgäu AL3 Unknown 900 20.12.2000
- isotopes (167Er21, 168Yb21, 171Yb21 …) stemming from the Australia AUS1 Unknown — —
- sample, and 84Kr1 and 86Kr1 from the argon gas (Ar) used to Canada CAN101 Unknown — —
Methods (brief)
- ICP-MS for food authentication
- MC-ICP-MS for food authentication
- coupled plasma mass spectrometry (MC-ICP-MS) has been used for the precise determination of variations in
- and limits to determine the geographical origins of different Emmental-type cheese samples. The sample
- samples, agreed within the stated measurement uncertainties, thus indicating that both the validation of the
- sample preparation procedures and the mass spectrometric measurements cause no evident bias effect with
- almost identically to Ca in milk and dairy products due to its of geological samples the overall mass contents of Sr range
- range of approximately 2.5 6 1024. hydrological samples (sea-water, rivers, rain …) and from 8 to
- Food authenticity is one aspect which is receiving more 2500 mg kg21 for biological samples (wood, roots …).
- element stable isotope mass spectrometry, major and trace be explained by the presence of significant amounts of dust
- components, differential weathering of highly radiogenic rocks Table 2 Origin of ‘‘Emmental’’ type cheese samples used for Sr
- MC-ICP-MS offers a way to establish accurate high Finland FI104 Toholammi 108 22.08.2002
- abundance ratio by MC-ICP-MS. The main factors are Salzburg SAL105 Unknown — 15.10.2002
- sample, and 84Kr1 and 86Kr1 from the argon gas (Ar) used to Canada CAN101 Unknown — —
- be affected (Table 1). Sample preparation
- This paper describes means of preventing or controlling the The sample preparation procedure for the determination of
- confirming their authenticity and establishing their geographic For each determination 1–2 g of cheese sample was weighed
- Sample selection sample temperature was held at 10 uC. Typical water loss for
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.
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Update history
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