Identification of nitrite treated tuna fish meat via the determination of nitrous oxide by head space-gas chromatography/mass spectrometry.

Tuna fish meat is an expensive and highly perishable sea food. Fresh meat has a bright red colour which soon turns into an unsightly brown during storage. To prolong the aspect of freshness, the red colour is stabilised or even enhanced e.

Photooxidation of Octahydro Tetramethyl Naphthalenylethanone in Perfumes and Aftershaves.

For consumer safety reasons, cosmetics that are exposed to light are evaluated with respect to phototoxicity and/or photoallergy (photosensitization). For perfumes/aftershaves, however, these tests are not performed with the cosmetic product but only with single fragrance compounds, which may influence the outcome. In the presence of a sensitizer, photoinduced oxidation of unsaturated fragrances might result in the formation of unwanted products.

Identification of organic pigments in tattoo inks and permanent make-up using laser desorption ionisation mass spectrometry.

Nowadays, about 12% of the European and 20% of the US population are tattooed. Rising concerns regarding consumer safety, led to legal restrictions on tattoo and permanent make-up (PMU) inks. Restrictions also include bans on certain colourants.

Chemical Analysis: An Indispensable Means for Uncovering Severe Cases of Fraud with Cosmetics and Tattoo Inks.

Three cases of fraud with commodities containing illegal stealth compounds are presented, which were uncovered by the State Laboratory Basel-City, Switzerland. All three commodities, grapefruit seed extracts, a phytocosmetical skin cream, and tattoo inks, were produced abroad, had forged declarations of ingredients and, in the case of the extracts and the cream, were marketed with far-reaching health claims. While inspections will identify suspicious products and would be able to eliminate health claims to some extent, only chemical analysis can uncover the illegal agents used and give law enforcement bodies the necessary evidence to immediately clamp down on those brands, where the stealth agent presents a serious health hazard to consumers.

Photostability and breakdown products of pigments currently used in tattoo inks.

Tattoos fade with time. Part of this fading can be attributed to the photodegradation of pigments. When people get tired of their tattoos, removal by laser irradiation is the method of choice.

Methotrimeprazine for the management of end-of-life symptoms in infants and children.

Objective: This retrospective chart review assessed the efficacy, dose, and safety of methotrimeprazine in palliating end-of-life symptoms in children and infants.

Methods: A retrospective chart review was conducted of 18 hospitalized pediatric patients who were treated with methotrimeprazine in their last two weeks of life. Data collected included age, diagnosis, symptoms, methotrimeprazine dose, route, efficacy, and any documented adverse effects.

Rolling--a new application technique for luminescent bacteria on high-performance thin-layer chromatography plates.

High-performance thin-layer chromatography (HPTLC) coupled with bioluminescence detection using Vibrio fischeri bacteria can be used for screening for unknown substances. This is accomplished by dipping the HPTLC plate in an aqueous bacteria solution. Especially polar substances, however, can start to dissolve during this process, which leads to blurring and tailing of the zones on the plate.