方案摘要
方案下载| 应用领域 | 食品/农产品 |
| 检测样本 | 水产品 |
| 检测项目 | 前处理 |
| 参考标准 | GB 5009.205-2013 食品中二噁英及其类似物毒性当量的测定；GB/T 28643-2012 饲料中二噁英及二噁英类多氯联苯的测定 同位素稀释-高分辨气相色谱 高分辨质谱法；GB 5009.190-2014 食品安全国家标准 食品中指示性多氯联苯含量的测定；GB 23200.88-2016 水产品中多种有机氯农药残留量的检测方法；GB/T 34270-2017 饲料中多氯联 |
Over the last several years some focus has been placed on improving efficiency for the determination of polychlorinated dibenzo-p- dioxins and polychlorinated dibenzo furans (D/Fs), as well as polychlorinated biphenyl (PCBs) and the polybrominated diphenyl ethers (PBDEs). Most efforts in this area have been focused on instrumentation; moving from expensive magnetic sector mass spectrometers 1 to triple quadrupoles 2,3 and orbital trapping mass spectrometers 4 . Lesser efforts have been placed on sample preparation stages, which can be divided into extraction, cleanup and concentration techniques. Although the manual preparation stage is inherently inexpensive, compared to instrumentation costs, low level contamination or poor recoveries can result in rework which negatively impacts the method, making this stage costly. Additionally, the extraction method varies depending upon the matrix category, which adds to the complexity, thus multiple extraction methods may be necessary depending upon the moisture and fat content of a matrix. The extraction of milk fat by an automated acid hydrolysis and abbreviated Soxhlet extraction for determination of POPs have been previously described 5 . By broadening the extraction method to include egg yolks, prepared cakes, prepared meats and raw tissues, we are moving toward a single, matrix-independent, extraction method.
Over the last several years some focus has been placed on improving efficiency for the determination ofpolychlorinated dibenzo-p- dioxins and polychlorinated dibenzo furans (D/Fs), as well as polychlorinatedbiphenyl (PCBs) and the polybrominated diphenyl ethers (PBDEs). Most efforts in this area have been focusedon instrumentation; moving from expensive magnetic sector mass spectrometers 1 to triple quadrupoles 2,3 and orbital trapping mass spectrometers 4 . Lesser efforts have been placed on sample preparation stages, which can be divided into extraction, cleanup and concentration techniques. Although the manual preparation stage is
inherently inexpensive, compared to instrumentation costs, low level contamination or poor recoveries can result in rework which negatively impacts the method, making this stage costly. Additionally, the extraction method varies depending upon the matrix category, which adds to the complexity, thus multiple extraction methods may be necessary depending upon the moisture and fat content of a matrix. The extraction of milk fat by an automated acid hydrolysis and abbreviated Soxhlet extraction for determination of POPs have been previously described 5 . By broadening the extraction method to include egg yolks, prepared cakes, prepared meats and raw
tissues, we are moving toward a single, matrix-independent, extraction method.
使用格哈特系列仪器进行添加植物成分的火鸡大腿肉丸中蛋白质、脂肪、膳食纤维的测定
岩玫瑰、 欧石南、 栗树、 黑莓及等比例混合花粉中蛋白质和总脂肪的测定
使用格哈特凯氏定氮仪、脂肪仪测定2种家养和1种野生燕窝蛋白质和脂肪含量
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