Journal - Association of Official Analytical Chemists最新文献_第10页

Comparison of Preston agar and a blood-free selective medium for detection of Campylobacter jejuni in food. 普雷斯顿琼脂与无血选择培养基检测食品中空肠弯曲杆菌的比较。

Journal - Association of Official Analytical Chemists Pub Date : 1991-07-01 DOI: 10.1093/JAOAC/74.4.651

M. Peterz

引用次数: 16

Lipid globule staining to aid in differentiating Bacillus species. 脂球染色帮助区分芽孢杆菌种类。

Journal - Association of Official Analytical Chemists Pub Date : 1991-07-01

S M Harmon, D A Kautter, G Lancette

引用次数: 0

A qualitative colorimetric test for brominated vegetable oil in soft drinks. 软饮料中溴化植物油的定性比色试验。

Journal - Association of Official Analytical Chemists Pub Date : 1991-07-01

M N Krishna Murthy, S Rajalakshmi, J A Satyabodha, K V Nagaraja

引用次数: 0

Evidence of an unusual pattern of polychlorinated biphenyls in the serum of some residents and canines in Paoli, Pennsylvania. 在宾夕法尼亚州保利的一些居民和犬的血清中发现了不寻常的多氯联苯模式的证据。

Journal - Association of Official Analytical Chemists Pub Date : 1991-07-01 DOI: 10.1093/JAOAC/74.4.577

V. Burse, D. Groce, M. P. Korver, S. Caudill, P. McClure, C. Lapeza, S. Head, R. Schilling, J. A. Farrar, S. Ostrowski

{"title":"Evidence of an unusual pattern of polychlorinated biphenyls in the serum of some residents and canines in Paoli, Pennsylvania.","authors":"V. Burse, D. Groce, M. P. Korver, S. Caudill, P. McClure, C. Lapeza, S. Head, R. Schilling, J. A. Farrar, S. Ostrowski","doi":"10.1093/JAOAC/74.4.577","DOIUrl":"https://doi.org/10.1093/JAOAC/74.4.577","url":null,"abstract":"The present study uses gas liquid chromatography (GLC) electron capture detection with packed and capillary columns to detect polychlorinated biphenyls (PCBs) in serum samples from people living near the electric car repair and maintenance facility of the Southeastern Pennsylvania Transit Authority in Paoli, Pennsylvania. Most of the cohort surveyed had serum patterns similar to patterns for Aroclor 1260 (AR 1260); a small portion (3/89) had patterns indicative of an AR with higher chlorination (e.g., AR 1268). In addition to analyzing serum samples from humans, we also analyzed serum samples from canines (pets of some of the subjects). In general, the serum pattern for canines was less descriptive for AR 1260 than the pattern for humans; however, the pattern for several canines (9/16) was that of the higher chlorinated PCBs (e.g., AR 1268). By using mass spectrometry and capillary column GLC, we confirmed the presence of high molecular weight polychlorinated congeners in both human and animal samples. We were not able to show a statistically significant relationship between serum patterns of PCBs in canines and their owners or between canines and certain behavioral traits (e.g., runs free, retrieves, hours outside, hours inside). However, the correlation between PCBs quantified as AR 1268 and canines' residence time was statistically significant.","PeriodicalId":14752,"journal":{"name":"Journal - Association of Official Analytical Chemists","volume":"25 1","pages":"577-86"},"PeriodicalIF":0.0,"publicationDate":"1991-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90076164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Multiresidue matrix solid phase dispersion (MSPD) extraction and gas chromatographic screening of nine chlorinated pesticides in catfish (Ictalurus punctatus) muscle tissue. 多残留基质固相分散(MSPD)提取和气相色谱法筛选鲶鱼肌肉组织中9种氯农药。

Journal - Association of Official Analytical Chemists Pub Date : 1991-07-01 DOI: 10.1093/JAOAC/74.4.667

Austin R. Long, Michael D Crouch, Steven A. Barker

{"title":"Multiresidue matrix solid phase dispersion (MSPD) extraction and gas chromatographic screening of nine chlorinated pesticides in catfish (Ictalurus punctatus) muscle tissue.","authors":"Austin R. Long, Michael D Crouch, Steven A. Barker","doi":"10.1093/JAOAC/74.4.667","DOIUrl":"https://doi.org/10.1093/JAOAC/74.4.667","url":null,"abstract":"A multiresidue technique for extraction and gas chromatographic screening of 9 insecticide (lindane, heptachlor, aldrin, heptachlor epoxide, p,p'-DDE, dieldrin, endrin, p,p'-TDE, and p,p'-DDT) residues in catfish (Ictalurus punctatus) muscle tissue is presented. The 9 insecticides, plus dibutyl chlorendate internal standard, were fortified into catfish muscle tissue (0.5 g) and blended with 2 g C18 (octadecylsilyl derivatized silica reverse-phase material). The C18/muscle tissue matrix blend was fashioned into a column by adding the blend to a 10 mL syringe barrel containing 2 g activated Florisil. The insecticides were then eluted from the column with acetonitrile (8 mL), and a portion (2 microL) of the acetonitrile eluate was then directly analyzed by gas chromatography with electron capture detection. Unfortified blank controls were treated similarly. The resultant extracts contained pesticide analytes (31.25-500 ng/g) free of interfering compounds when analyzed. Correlation coefficients for the 9 extracted pesticide standard curves (linear regression analysis, n = 5) ranged from 0.9967 (+/- 0.0018) to 0.9999 (+/- 0.0001). Average percentage recoveries (82 +/- 4.8% to 97 +/- 3.6%, n = 25 for each insecticide), interassay (5.0 +/- 2.7% to 16.9 +/- 6.5%, n = 25 for each insecticide) and intraassay (1.8 to 4.7%, n = 5 for each insecticide) variabilities were indicative of an acceptable methodology for the analysis and screening of these residues in catfish muscle tissue.","PeriodicalId":14752,"journal":{"name":"Journal - Association of Official Analytical Chemists","volume":"118 1","pages":"667-70"},"PeriodicalIF":0.0,"publicationDate":"1991-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79483904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 26

Quantitative determination of amines in wine by liquid chromatography. 酒中胺的液相色谱定量测定。

Journal - Association of Official Analytical Chemists Pub Date : 1991-07-01 DOI: 10.1093/JAOAC/74.4.695

A. Ibe, K. Saito, M. Nakazato, Y. Kikuchi, K. Fujinuma, T. Nishima

{"title":"Quantitative determination of amines in wine by liquid chromatography.","authors":"A. Ibe, K. Saito, M. Nakazato, Y. Kikuchi, K. Fujinuma, T. Nishima","doi":"10.1093/JAOAC/74.4.695","DOIUrl":"https://doi.org/10.1093/JAOAC/74.4.695","url":null,"abstract":"A liquid chromatographic (LC) procedure is described for the determination by dansylation of the following 16 kinds of biogenic amines found in wine: monomethylamine (MM), ethylamine (EM), iso- and n-propylamine (Pr), iso- and n-butylamine (Bu), iso- and n-amylamine (Am), pyrrolidine (PY), 2-phenethylamine (PH), tryptamine (TR), putrescine (PU), cadaverine (CA), histamine (HI), tyramine (TY), and spermidine (SP). The amines in white and red wine were applied to a column of Amberlite CG-50 type I resin (Na-form) after the column had been washed with water and eluted with 1N hydrochloric acid. This eluate was evaporated to dryness under reduced pressure and derivatized with dansyl chloride (DNS). LC separations were performed on Finepak SIL C18S and LiChrosorb RP-8 columns with an acetonitrile-water elution gradient. In the survey of commercial wines by this method, most of the samples were found to contain 12 amines, including iso-Am, CA, PU, TY, and others. The highest levels of these amines were 4.84 micrograms PU/mL in red wine, and 5.11 micrograms iso-Am/mL in white wine. The total levels of amines in red wine were comparatively higher than in white wine.","PeriodicalId":14752,"journal":{"name":"Journal - Association of Official Analytical Chemists","volume":"61 1","pages":"695-8"},"PeriodicalIF":0.0,"publicationDate":"1991-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88370996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 38

Determination of carbadox-related residues in swine liver by gas chromatography/mass spectrometry with ion trap detection. 离子阱气相色谱/质谱法测定猪肝中卡巴多相关残留物。

Journal - Association of Official Analytical Chemists Pub Date : 1991-07-01 DOI: 10.1093/JAOAC/74.4.611

M. Lynch, F. R. Mosher, R. Schneider, H. Fouda, J. Risk

引用次数: 10

Rapid pentachlorophenol evaluation in solid matrixes by second derivative UV spectroscopy for application to wood and leather samples. 固体基质中五氯酚的二阶导数紫外光谱快速评价方法在木材和皮革样品中的应用。

Journal - Association of Official Analytical Chemists Pub Date : 1991-07-01 DOI: 10.1093/JAOAC/74.4.674

M. Secchieri, C. Benassi, S. Pastore, A. Semenzato, A. Bettero, M. Levorato, A. Guerrato

引用次数: 3

Symposium on microbiology update: old friends and new enemies. Staphylococcus aureus. 微生物学研讨会最新进展:老朋友和新敌人。金黄色葡萄球菌。

Journal - Association of Official Analytical Chemists Pub Date : 1991-07-01

M S Bergdoll

{"title":"Symposium on microbiology update: old friends and new enemies. Staphylococcus aureus.","authors":"M S Bergdoll","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The analytical methods for the detection of the staphylococcal enterotoxins can be divided into 2 categories: (1) methods for detection of enterotoxin-producing staphylococcal strains; (2) methods for detection of enterotoxin in foods. Gel diffusion methods (Ouchterlony, microslide), in which the enterotoxin produced by any given strain is compared to one of the identified enterotoxins, are used most frequently for strain testing. The sensitivity of these methods is from 0.1 to 0.5 micrograms enterotoxin/mL, which is normally adequate to determine the enterotoxigenicity of strains. The methods for the detection of enterotoxin in foods need to be much more sensitive to detect less than 1 ng of enterotoxin/g of food that may be present. The radioimmunoassay (RIA), the enzyme-linked immunosorbent assay (ELISA), and the reversed passive latex agglutination (RPLA) method have the necessary sensitivity to detect 1 ng/g of enterotoxin in foods without the use of complicated extraction-concentration procedures. Kits based on the ELISA and RPLA methods are now available commercially for the detection of enterotoxins in foods. Tests have shown that the ELISA methods are somewhat more sensitive than the RPLA method.</p>","PeriodicalId":14752,"journal":{"name":"Journal - Association of Official Analytical Chemists","volume":"74 4","pages":"706-10"},"PeriodicalIF":0.0,"publicationDate":"1991-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13076880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Symposium on microbiology update: old friends and new enemies. Clostridium perfringens. 微生物学研讨会最新进展:老朋友和新敌人。perfringens梭状芽胞杆菌。

Journal - Association of Official Analytical Chemists Pub Date : 1991-07-01

R G Labbé

引用次数: 0