三种食用植物油桐掺检验方法的比较

食用植物油中掺有桐油含量在 0 3%以上时 ,大多数人都会有不适的生理反应 ,含桐油量超过 0 5 %时 ,会出现恶心、腹泻、呕吐等中毒现象。目前 ,国标法测定食用植物油中掺混桐油的方法有三种 ,即三氯化锑 -三氯甲烷界面法、亚硝酸盐法和硫酸法。在实际工作中 ,我们发现这三种检验方法检测不同桐掺样品的适用性有差别 ,现将对比试验结果报告如下 :1　材料与方法1 1　试验材料从有关制油厂及油库选取纯洁菜油、茶油、精炼棉籽油、麻油、花生油及豆油等 6种食用植物油 ,另选取了纯净桐油用于配制桐掺样。1 2　测定方法按中华人民共和国国家标…     

污染食品中桐油的快速检测法研究

桐油是黄棕色干性油 ,是应用甚广的工业用植物油 ,其主要成分是桐酸 ,为含有三个双键的不饱和脂肪酸 ,对胃肠道有强烈的刺激作用 ,引起恶心、呕吐和腹泻 ,粪便带血 ,继发性脱水和酸中毒症状。桐油的色、味与一般食用植物油相似 ,常因混入食用油中或误食中毒。桐油的测定方法有亚硝酸法、三氯化锑法、苦味酸法、硫酸法等。这些方法多为定性半定量 ,且检出限低。本方法在亚硝酸法的基础上 ,通过变液体酸试剂为固体酸试剂、减少试剂用量、缩短样品前处理时间及简化前处理过程及使用自行设计的智能型微型光电检测仪使方法达到定量。此法灵敏、准…     

油炸食品中桐油的检测方法

桐油是一种工业用油。因其含有的桐子酸（9,11,13-十八碳三烯酸）甘油酯是一种有毒、有害物质,所以,桐油绝对不准食用,否则,就会引起严重中毒。但是,由于桐油易干燥、无异味、色泽好、价格低,且与食用植物油（豆油、花生油）的感官性状极其相似,就有一些个体商贩在食用植物油中掺加桐油,用来炸油条、炸鸡等。如果食用了此类食品,就会引起食物中毒。对此,我们进行了研究,确定了油炸食品中桐油的快速检测方法。     

食用油营养有别按需吃

超市里,各种食用油是越来越让我们眼花缭乱,调和油、色拉油,花生油、玉米油、葵花籽油、橄榄油,初榨油、精炼油……植物油因其取材不同,营养价值、口味也有所差别。芝麻油俗称香油,是植物油中的熟油,它是唯一经过炒熟之后再压榨的植物油,同时也是因为芝麻     

食油对红细胞变形能力及膜流动性等指标的影响

以含１１％猪油、茶油、棉油、棕桐油及调和油的高胆固醇饲料分别饲养大鼠。发现：（１）棕桐油组血清总胆固醇（Ｔｃ）及ＬＤＬ－ｃ最低，猪油组最高，茶油组次之，ＨＤＬ－ｃ以棉油组最高，调和油组次之，猪油组及棕桐油组最低。ＨＤＬ－Ｃ／Ｔｃ也以棉油组最高，猪油组及茶油组最低。ＴＧ以猪油组及茶油组较高。（２）血清丙二醛以棕桐油组最低，猪油组最高。（３）棉油组的血清超氧化物歧化酶（ＳＯＤ）活力及肝ＳＯＤ活力较高。（４）棕榈油组及调和油组的血小板聚集率较低。（５）调和油组及棉油组的血栓素Ｂ２／６－酮前列腺素Ｆ１α比值较低。（６）茶油组及棉油组的红细胞变形能力较大。茶油组的红细胞膜流动性最好。     

食用植物油中桐油蓖麻油的确证检验方法研究

食用植物油是人们日常生活的必需品,它的质量好坏直接关系到广大消费者的切身利益。由于污染、掺假等原因,误食桐油、蓖麻油导致中毒的事件时有发生。目前食用植物油中蓖麻油的检验方法不多,而食用植物油中桐油的检测方法虽然较多,但是适用性和定性准确度都不够。本文利用气相色谱-质谱分析技术,辅以简便可靠的样品前处理方法,建立了测定食用植物油中掺(混)入桐油、蓖麻油的确证分析方法。本法准确度高,定性结果尤为可靠。经抽取30余份市售各种植物油样品测定,方法精密度高,测定相对标准偏差<6%,检出限可达0.1%,结果满意。     

漫谈棕榈油

豆油、花生油、菜籽油、棉籽油、葵花籽油、芝麻油这些植物油您已很熟悉,这里我向您介绍植物油王国中的一位“外来朋友”——棕榈油,通过我的介绍,也许您会喜欢上它。 棕榈油是从油棕树果实中榨出的油脂。油棕树原产于非洲西部,考古发现证明,油棕的使用、食用历史已超过5000年。现在经过改良的油棕树已广泛在东南亚、非洲及拉丁美洲栽种。     

食用植物油中掺（混）入桐油的快速检测

桐油 (Ｔｕｎｇｏｉｌ) ,呈淡黄至金黄色 ,无异味 ,有毒害 ,比重轻 ,干燥快 ,耐热、防腐、防锈、抗酸碱性能好 ,在工业上广泛用于油漆、涂料和金属防腐剂等 ,是一种重要的工业用油。桐油中含有桐子酸 (9,11,13十八碳三烯酸 )的甘油酯 ,是一种有毒、有害物质 ,人食用后 ,能引起中毒症状。严重者可影响肾功能 ,甚至呼吸困难、抽筋 ,心脏麻痹而身亡。所以 ,桐油绝对不准食用。但是 ,由于它与一般食用植物油的感官性状极其相似 ,有个体商贩在食用植物油中掺加桐油 ,或用掺(混 )有桐油的食用油来制造粮油食品 ,如炸油条、炸油饼、炸面包卷、炸鸡…     

食用植物油种类与酸败对梓油定性结果的影响分析与探讨

目的：分析食用植物油种类与酸败对溴素-乙醚法定性检测梓油结果的影响。方法：用溴素一乙醚法分组定性检测不同种类正常植物油、酸败豆油及梓油阳性对照系列。结果：豆油、棉子油出现假阳性结果，花生油、菜子油出现可疑阳性结果，酸败植物油出现假阳性结果。结论：用溴素-乙醚法定性检测梓油，空白对照应加入与分析样品同种类的正常植物油，同时对检品应进行酸败指标检测，对于酸败的食用植物油样品，梓油定性检测结果应结合现场调查资料进行综合判定。     

强化植物油改善维生素A营养状况的效果观察

<正> 1982年全国营养调查表明,城市人口平均维生素A(VA)摄取量仅为供给量标准的60～80％。可见,如何提高VA营养水平是改善我国人民膳食结构的重要内容之一。为此,我们研制出VA强化植物油,并进行人体实验观察强化油的效果。 材料与方法 强化剂为人工合成的VA醋酸酯,载体为市售棉籽油和芝麻油。用棉籽油配制时,首先按工艺要求制成原油,食用前厨师按说明加入烹调油混匀。此油除不适用于长时间炸食品外,无其它限制。使用芝麻油配制时,预先制成原油,食用前由厨师按说明加入芝麻油内混匀,     

Comparative effects of dietary corn oil,safflower oil,fish oil and palm oil on metabolism of ethanol and carnitine in the rat

OBJECTIVE: This study was launched to determine comparative effects of corn oil (CO), safflower oil (SO), fish oil (FO) and palm oil (PO) on carnitine status and ethanol metabolism in rats. METHODS: Twenty-four male Sprague-Dawley rats (300 g bw) were randomly divided into four groups (n = 6) and fed a semisynthetic diets containing fat as oils listed above. Blood and 24 hour urine samples were collected before and after dietary treatment and acute ethanol administration. Samples were analyzed for blood-ethanol concentration (BEC) and carnitine species. RESULTS: The diets containing FO and PO retarded ethanol metabolism compared to the diets containing CO and SO. The effect of these dietary fats on carnitine species in plasma and urine was varied before and after dietary treatment and following a single oral ethanol dose. The liver carnitine content was higher in the PO group after dietary and ethanol treatment. CONCLUSION: It is concluded that attenuation of ethanol clearance was related to unique fatty acid makeup of the oils that in part may be attributed to the composite ratio of saturated to unsaturated fatty acids in the oils.     

Nabali olive oil ripening and oil properties

The effect of ripening of "Nabali" olives on the yield and some properties of the extracted oil was examined. Seven samples were harvested every 2 weeks and analyzed for moisture and oil content. The extracted oil was subjected to chemical analysis. Oil content increased and there were some significant changes in the proportions of fatty acids. Nabali olive oil is relatively high in arachidic, stearic and linoleic acids.     

Olive oil and the Mediterranean diet

The high intake of olive oil in the Mediterranean diet contributes to the low intake of saturated fatty acids among populations in Southern Europe and is associated with a low incidence of coronary heart disease. Replacement of saturated fatty acids with oleic acid leads to a reduction in low-density lipoprotein (LDL) cholesterol without decreasing the concentration of high density lipoprotein (HDL) cholesterol. Oleic acid, however, may not be neutral with regards to its effects on risk of thrombosis which may have adverse consequences in populations with established atherosclerosis.     

Assessment of levels of polycyclic aromatic hydrocarbons in the oil from Kuwait oil lakes

In an attempt to assess the potential impacts resulting from the oil fires started during the Gulf War, levels of polycyclic aromatic hydrocarbons (PAHs) were determined in Kuwaiti oil lakes. Samples were collected from two oil lakes within each of the four oil fields heavily damaged during the 1991 Gulf War. The oil samples were fractionated and the aromatic fraction analyzed quantitatively by gas chromatography/mass spectrometry (GC/MS). In addition, the effect of weathering on the PAH content was monitored over a 21-month period. The results indicated that total PAH contents initially ranged from 52.4 to 425.7 mg/kg in oil lakes. Phenanthrene and chrysene were the major PAHs in most of the samples. Benzo(a)pyrene was detected in all samples in varying amounts (0.46 to 5.3 mg/kg). Total PAH contents were higher, after 21 months, ranging from 59.55 to 616.9 mg/kg. Concentration of benzo(a)pyrene also increased considerably (from 0.16 to 22.2 mg/kg). The hazard potential of these compounds in Kuwait's environment was assessed and indicated that large amounts of the remaining oil will continue to have serious ecological implications unless immediate measures are taken to deal with the problem.     

保健油8例

沙棘油 从沙棘籽或果渣中提取：每100克沙棘油中台有100毫克维生素A(高于鱼肝的含量）和120毫克维生素E，沙棘油中还富舍亚油酸、醇类、酚类以及钾、钙钠、镁、铁等多种矿物元素，