Steinemann 2020 - volatile emissions from car air fresheners

Steinemann and colleagues analyzed volatile organic compound emissions from 12 car air fresheners by headspace GC/MS. The paper is mostly a VOC-emissions study rather than a heavy-metal concentration survey, but it is routeable as home-air emission context because one emitted compound was tetracarbonylnickel (CAS 13463-39-3), an organonickel species. No total nickel concentration or emitted mass concentration is reported.

Key numbers

• Sample frame: 12 car air fresheners from California stores, including 6 car vent air fresheners (2 natural, 4 regular), 3 hanging air fresheners (3 regular), 2 can air fresheners (2 natural), and 1 spray air freshener (1 regular).
• Analytical setup: approximately 2 g of product placed in a 10 mL amber vial and analyzed by headspace GC/MS.
• Table 1: across all 12 car air fresheners, the study reported 546 emitted VOC occurrences and 275 VOC identities.
• Table 1: potentially hazardous VOCs totaled 30 occurrences and 9 identities; 23 potentially hazardous VOC occurrences were from 8 regular products, and 7 were from 4 natural products.
• Table 1: product labels or safety data sheets listed 10 VOC occurrences and 10 identities; 0 potentially hazardous VOCs were listed.
• Table 2: most prevalent VOCs across all products included limonene in 10 of 12, benzyl acetate in 9 of 12, acetone in 9 of 12, ethanol in 9 of 12, linalool in 8 of 12, acetaldehyde in 8 of 12, and methanol in 8 of 12.
• Table 3: tetracarbonylnickel (CAS 13463-39-3) occurred in 1 product, was classified as California Proposition 65 and asthmagen-listed, and was not listed on a product label or safety data sheet.
• Supplementary Table 2 also reports tetracarbonylnickel* (CAS 13463-39-3) with prevalence 1 in all car air fresheners, 1 in regular products, and 0 in natural products.
• The authors report that all products emitted at least one VOC classified as potentially hazardous, but they do not provide product-specific concentration values for tetracarbonylnickel.

Methods (brief)

The study used a convenience sample of car air fresheners selected from California retail settings. Volatile emissions were measured by headspace gas chromatography/mass spectrometry using a Shimadzu GC/MS-QP2010 Plus instrument, BPX-VOL capillary column, and Shimadzu AOC-500 automated sample-injection system. Compound identification used the NIST Version 2.0 mass-spectral library. Potentially hazardous VOCs were identified using U.S. EPA hazardous air pollutant listings, California Proposition 65, and Association of Occupational and Environmental Clinics asthmagen classifications.

Implications

Certification (HMTc): This source supports only qualitative organonickel emission context for home-air emission products. It should not be pooled as a nickel concentration dataset because the paper reports occurrence/prevalence of tetracarbonylnickel as a VOC identity, not an emitted nickel mass, product nickel content, or total nickel concentration.

Courses: The paper is useful for teaching the difference between product composition, headspace VOC identity/prevalence, and quantitative metal concentration.

App: If home-air emission product context is surfaced, this source can flag that an organonickel VOC was detected in one regular car air freshener, while making clear that no nickel concentration was reported.

Wiki pages this source may touch

• home-air-emission-products-other
• nickel

Verification notes

• PDF text was extracted with pdftotext -layout to /tmp/ingest.txt; the abstract, Methods, Tables 1-3, Supplementary Table 1 headings, and Supplementary Table 2 entry for tetracarbonylnickel were checked against this page.
• Identity checks before creation: DOI 10.1007/s11869-020-00886-8, exact title, raw handle MFK_cat21-12-car-air-fresheners-volatile-emissions, raw SHA-256 16f085d20707bf560106aa193f97bacfe025c6edddf375de33ab75c875d721b7, and candidate cite key steinemann2020-car-air-freshener-vocs were searched in wiki/sources/ and data/evidence/audit-queue.csv; no existing source page was found.
• Units: the key routeable metal-related result is prevalence count (1 product), not a concentration. No mg/kg, ug/m3, or other concentration unit is reported for tetracarbonylnickel in the extracted text.
• Speciation: the source reports tetracarbonylnickel, an organonickel species. The page routes this under Ni only because no closed frontmatter slug exists for tetracarbonylnickel, and it does not collapse the finding into total nickel.
• Brand firewall: the paper does not report brand-specific values in the extracted text; product identities are treated as car air-freshener types only.
• Product slug note: no exact car-air-freshener product slug exists in the current taxonomy. The page routes through home-air-emission-products-other.
• Evidence tier: B because this is a peer-reviewed emissions study with transparent analytical methods, but it is not a quantitative metal occurrence study and the nickel-related result is presence/prevalence only.

Page history

The five most recent substantive edits to this page. 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.