Gas chromatographic mass spectrometric study of photodegradation of carbamate pesticides

被引：38

作者：

Climent, MJ ^{[1
]}

Miranda, MA ^{[1
]}

机构：

[1] UNIV POLITECN VALENCIA,INST TECNOL QUIM,DEPT QUIM,E-46071 VALENCIA,SPAIN

来源：

JOURNAL OF CHROMATOGRAPHY A | 1996年 / 738卷 / 02期

关键词：

photodegradation; environmental analysis; carbamates; pesticides;

D O I：

10.1016/0021-9673(96)00084-2

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

The photodegradation of seven carbamate pesticides (bendiocarb, isoprocarb, promecarb, ethiofencarb, furathiocarb, fenoxycarb and pirimicarb), in aqueous solution, has been examined by GC-MS. The most general result was formation of the corresponding phenols. Irradation of isoprocarb and promecarb also resulted in photo-Fries rearrangement to ortho- and para-hydroxybenzamides. In the case of ethiofencarb photocleavage of the carbon-sulfur bond gave 2-methylphenyl methylcarbamate as main product. Likewise, N-S bond cleavage occurred upon irradiation of furathiocarb, to allow the formation of the carbamate insecticide carbofuran, butyl methylcarbamate and carbofuranphenol. Under similar conditions, fenoxycarb gave p-phenylphenol and 2-hydroxydibenzofuran, through primary homolysis of the aryloxy-methylene bond. Finally, pirimicarb gave rise to 2-formylamino-5,6-dimethylpyrimidin-4-yl dimethylcarbamate.

引用

页码：225 / 231

页数：7

共 13 条

[1]

Bellus D., 1971, ADV PHOTOCHEM, V8, P109, DOI 10.1002/9780470133385.ch3

[2]

BERTRAND N, 1991, ANAL CHIM ACTA, V254, P235

[3]

EHRL VA, 1995, ATOMKERNENERG/KERNT, V25, P239

[4] PHOTOCLEAVAGE OF PHENOXYPHENOLS AND BROMOPHENOLS [J].

JOSCHEK, HI ;

MILLER, SI .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1966, 88 (14) :3269-+

[5] PHOTOCHEMICAL DEGRADATION OF PESTICIDES AND OTHER CHEMICALS IN THE ENVIRONMENT - A CRITICAL-ASSESSMENT OF THE STATE-OF-THE-ART [J].

KLOPFFER, W .

SCIENCE OF THE TOTAL ENVIRONMENT, 1992, 123 :145-159

[6] PHOTODEGRADATION OF THE CARBAMATE INSECTICIDE ETHIOFENCARB [J].

KOPF, G ;

SCHWACK, W .

PESTICIDE SCIENCE, 1995, 43 (04) :303-309

[7]

Kuhr R. J., 1976, CARBAMATE INSECTICID

[8]

LOHMANN D, 1989, CRC CRIT R THER DRUG, V1, P263

[9]

Miranda M.A., 1992, CHEM FUNCT GROUPS, V2, P1271

[10]

MIRANDA MA, 1995, HDB ORGANIC PHOTOCHE, P570

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