Detail of "2058-94-8"

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Method for trace level analysis of C8, C9, C10, C11, and C13 perfluorocarbon carboxylic acids in water

Method for trace level analysis of C8, C9, C10, C11, and C13 perfluorocarbon carboxylic acids in water. Risha, Karen; Flaherty, John; Wille, Roice; Buck, Warren; Morandi, Francesco; Isemura, Tsuguhide (Exygen Research, State College, PA 16801, USA). Analytical Chemistry, 77(5), 1503-1508 (English) 2005 American Chemical Society. CODEN: ANCHAM. ISSN: 0003-2700. DOCUMENT TYPE: Journal CA Section: 61 (Water) Section cross-reference(s): 80 A method was developed for the trace level anal. of pentadecafluorooctanoic acid (C8), heptadecafluorononanoic acid (C9), nonadecafluorodecanoic acid (C10), heneicosafluoroundecanoic acid (C11) and pentacosafluorotridecanoic acid (C13) in water. Samples were concd.Chemicals with cas numbers 335-76-2 and 2058-94-8 also play role. by solid-phase extn. (SPE) before anal. by combined liq. chromatog./electrospray tandem mass spectrometry (LC/MS/MS). A surrogate std., 9-hydrohexadecafluorononanoic acid (9H), was used to monitor recovery. The lower limit of quantitation (LLOQ) for C8, C9, C10, C11, and C13 was detd. to be 25 ng/L in water. The specificity of the method was established by showing no significant interferences (<20% of the LLOQ std.) in control samples of well, stream, spring, tap, Omnisolve, and type I water at the retention time of the target analytes. The linearity of the method was detd.; the coeffs. of detn. for the 5 calibration curves generated were all >0.985. Good within-day and between-day accuracy and precision were demonstrated. Exts. and stds. were shown to be stable after remaining at room temp. for u24 h. Samples fortified with C8, C9, C10, and C11 were shown to be stable after remaining at room temp. for 14 days before extn. Samples fortified with C13 were shown to be stable after remaining at room temp. for 7 days before extn. Fortified samples, exts., and stds. demonstrated stability after being stored in a refrigerator for 14 days for all analytes. Long-term storage stability was demonstrated for methanolic stock solns. .

Persulfate-induced photochemical decomposition of perfluoroctanoic acid (PFOA) and its related chemicals in water

All Rights Reserved. Persulfate-induced photochemical decomposition of perfluoroctanoic acid (PFOA) and its related chemicals in water. Hori, Hisao; Yamamoto, Ari; Kutsuna, Shuzo (Res. Inst. Environ. Manage. Technol., National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8569, Japan). Yosui to Haisui, 48(12), 1081-1087 (Japanese) 2006 Sangyo Yosui Chosakai. 307-24-4 and 2058-94-8 are cas registry numbers. These chemicals are also mentioned in this article. CODEN: YOHAAP. ISSN: 0513-5907. DOCUMENT TYPE: Journal CA Section: 61 (Water) Section cross-reference(s): 74 Environmentally persistent perfluoroctanoic acid (PFOA, C7F15COOH) was rapidly and effectively decompd. into F ion and CO2 by using persulfate as a photochem. oxidant. An aq. soln. (22 mL) contg. K2S2O8 (1.10 and 50.0 mM) and PFOA (29.6 mmol and 1.35 mmol) was irradiated with a Hg-Xe lamp in the presence of O2 (0.048 MPa) at 25° for 12 h, and the gas phase after the reaction was analyzed by GC-MS with conductometric detection, while the aq. phase by ion-chromatog., ion exclusion chromatog., and HPLC to obtain the optimum condition for the decompn. Furthermore, H2O-insol. long chain perfluorinated acids (PFCA) such as PFDA (C9F19COOH) and PFUA (C10F21COOH) were also decompd. into F ion by means of aq./liq. CO2 biphasic system. From the anal. results of degrdn. products of PFCA, the mechanism of the decompn. via shorter chain products was discussed. .