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:
- (CRC) before use. Purchase 100% cotton facial wipes (dimensions distilled water in the tube with the ascorbic acid. Replace and
- Cotton Organic Rounds). For each purchase, select 10% from dissolve the powder.
- MS/MS) (14) with a limit of detection (LOD) at 0.19 nanogram Using the pipette, squirt 1 ml of ascorbic acid solution onto
- (ng)/wipe (12). Acceptable levels of contamination in each wipe one cotton round; repeat with an additional 1 ml of solution.
- in the screened sample wipes are higher than that, discard the ascorbic acid solution; wipes are stable for at least 8 h.
-
- Two 100% pre-screened cotton facial wipes (see section Pre- Put on a new pair of gloves, set the amber vial labeled as “blank”
- the amber vial, replace the cap, and place the vial in the Analyzing field blanks that are equal to ≥20% of the total
- numbers and submerge the plastic bag containing the samples in from 276 pediatric emergency department patients (Median
- shipment and/or analysis. Ship samples and blanks on dry ice via Geometric Mean = 89.7 ng/wipe; 95% Confidence Interval
- overnight mail to the laboratory for analysis. Nicotine analysis of = (78.9; 102.0), Mdn = 102.6 ng/wipe, Interquartile range
- hand wipes by isotope dilution LC-MS/MS has previously been = 46.4–181.9. Field blanks were analyzed to adjust for
- SPECIAL CONSIDERATIONS FOR BUSY corrections ranged from 0 to 16.7 ng nicotine/wipe for the
Methods (brief)
- Collecting Hand Wipe Samples to
- Collecting Hand Wipe Samples to THS exposure in non-smokers; (2) the associations between THS exposure and clinical illnesses; (3)
- Mahabee-Gittens et al. Collecting Hand Wipe Samples
- Hand Wipe Sample Collection
- Follow these procedures up to 48 h prior to hand wipe sample
- In this paper, we present methods that represent best practices dish with two wipes ready to deploy and sample collection vials
- control/quality assurance practices that should be used are also sample material workstation by placing aluminum foil on this
- presented to ensure the samples are collected correctly and clean surface.
- liquid chromatography with tandem mass spectrometry (LC- two cotton rounds, and place the lid on the table, open side up.
- MS/MS) (14) with a limit of detection (LOD) at 0.19 nanogram Using the pipette, squirt 1 ml of ascorbic acid solution onto
- in the screened sample wipes are higher than that, discard the ascorbic acid solution; wipes are stable for at least 8 h.
- Baking Amber Sample Collection Vials the foil, and retighten the lids. Using a permanent marker and
- the vials with aluminum foil, place in a laboratory oven, and bake wipe” with a number and date that matches the sample number
- at 450◦ C for 6 h. Rinse Teflon caps with methanol three times, let of the hand wipe sample.
- Obtaining the Hand Wipe Samples
- the prepared wipes and sample vials, gloves, a data sheet to
- wearing gloves. For each hand wipe sample planned, the kits
- record sample collection, signed informed consent documents as
Implications
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Verification notes
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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.