摘要:

The cadmium, silver, lead, copper, zinc, manganese, iron and mercury levels in the edible and inedible tissues of raw and tinnedLoligo patagonicasquid were determined using flame atomic absorption spectrometry (AAS) for Cd, Ag, Pb, Cu, Zn, Mn and Fe and cold‐vapour AAS for Hg. The mean values obtained relative to the wet‐weight (mg/kg) for the edible parts (skinless mantle, arms and crone and fin) of the raw and tinned (mantle) squid, and in whole raw and tinned squid, were: 0.32, 0.32, 0.31, 4.3, 3.2 and 3.0 for Cd, 1.0, 0.34, 0.77, 0.27, 0.59 and 0.44 for Pb, 7.8, 5.5, 11, 33, 22 and 26 for Cu, 12, 13, 12, 19, 16 and 17 for Zn, 0.38, 0.45, 0.48, 0.75, 0.48 and 0.73 for Mn and 2.7 2.3, 3.4, 3.4, 2.2 and 9.4 for Fe, respectively. The content of silver and mercury in the mantle of the tinned squid were 0–18 and 0–012 mg/kg, respectively. As a consequence of whole squid processing, highly elevated levels of cadmium, and also somewhat higher levels of some of the other trace metals, were found in the edible parts of the tinned squid. The content of cadmium in the edible parts of the squid in all instances exceed, and for edible parts of the tinned whole squid considerably exceed, the proposed tolerance limit for cadmium in fishery products (0.05 mg/kg).

ISSN:0265-203X    

DOI:10.1080/02652038909373808

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A previously published method for the determination of deoxynivalenol (DON) and nivalenol (NIV) in grains by capillary gas chromatography (GC) with electron‐capture detection (ECD) has been modified to include HT‐2 toxin (HT‐2), T‐2 toxin (T‐2) and diacetoxyscirpenol (DAS). Recoveries of the five trichothecenes from wheat averaged 71–92% in the range 0.8–4 μg/g. Detection or quantitation limits found in two laboratories were from 0.02 to 0.4 μg/g, with those for T‐2 and DAS at the high end of this range. The method proved of practical use in survey work for the screening and determination of these trichothecenes in wheat from the 1987 western Canadian crop. There were no false positives for HT‐2, T‐2 and DON in durum and HY‐320 wheat. However, interferences precluded the determination of 4‐ and 15‐monoacetoxyscirpenol (MAS) by GC‐ECD. The natural ocurrence of HT‐2 toxin (0.06–0.59 μg/g) was demonstrated by GC‐ECD and confirmed by GC‐mass spectrometry (MS) in 23 samples of durum and HY‐320 wheats (1986 and 1987 crops); it was almost always accompanied by DON and in one sample a low concentration of NIV (0.05 μg/g). False positives for HT‐2 and DAS in red spring wheat detected in 1987 by GC‐ECD were 6% (nearly all identified as variety Katepwa) and 8%, respectively. Hence confirmation of suspected HT‐2 and DAS by GC—MS is necessary, particularly with red spring wheat.

ISSN:0265-203X    

DOI:10.1080/02652038909373809

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Potter's New Cyclopaedia of Botanical Drugs and Preparations.By R. C. Wren, revised by E. M. Williams and F. J. Evans. The C. W. Daniel Co. (Saffron Walden, Essex, UK). Pp. 362 Price £14.25 (paperback). ISBN 0 85207 1973.

ISSN:0265-203X    

DOI:10.1080/02652038909373810

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0265-203X    

DOI:10.1080/02652038909373811

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

ISSN:0265-203X    

DOI:10.1080/02652038909373797

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor