CN109540879A - 一种油脂类食品中抗氧化剂的快速检测方法 - Google Patents

一种油脂类食品中抗氧化剂的快速检测方法 Download PDF

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CN109540879A
CN109540879A CN201811435598.1A CN201811435598A CN109540879A CN 109540879 A CN109540879 A CN 109540879A CN 201811435598 A CN201811435598 A CN 201811435598A CN 109540879 A CN109540879 A CN 109540879A
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李亮
李元
程勇
刘荣利
胡晓佳
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Xian Peihua University
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Abstract

一种油脂类食品中抗氧化剂的快速检测方法,将定量滤纸在显色剂中浸泡30min;将氢氧化钠饱和乙醇溶液加到浸泡有试纸的显色剂中,阴干后备用;建立标准比色卡,比色卡上共分六种颜色,分别对应抗氧化剂含量的六个区间;将油脂类的食品进行样品提取,将提取液滴在所述阴干后的试纸上,观察颜色变化,根据比色卡判定抗氧化剂的含量区间,含量越高显色颜色越深。本发明利用合适的显色剂以及试纸材料,可快速检测油脂类食品中抗氧化剂含量,本发明可应用于食品安全筛查中,适合大批量样品的处理。

Description

一种油脂类食品中抗氧化剂的快速检测方法
技术领域
本发明属于食品安全检测技术领域,涉及到油脂类食品中抗氧化剂快速检测,为一种油脂类食品中抗氧化剂的快速检测方法。
背景技术
食用油脂或含油脂的食品,如果在不适宜的条件下长期储存,油脂会产生一系列的化学变化,致使油脂分解出醛、酮、低级脂肪酸及各种氧化物和过氧化物,这种改变称为“酸败”。如何防止这种变化,这就需要添加抗氧化剂,而叔丁基羟基茴香醚(BHA)、2,6二叔丁基对甲酚(BHT)正是常用于食品的两种酚类合成抗氧化剂,是能阻止或延缓食品氧化变质,提高食品稳定性和延长贮存期的食品添加剂,在食品生产中常被单独或混合使用。
食用油脂或含油脂的食品,如果在不适宜的条件下长期储存,油脂会产生一系列的化学变化,致使油脂分解出醛、酮、低级脂肪酸及各种氧化物和过氧化物,这种改变称为“酸败”。如何防止这种变化,这就需要添加抗氧化剂,而叔丁基羟基茴香醚(BHA)、2,6二叔丁基对甲酚(BHT)正是常用于食品的两种酚类合成抗氧化剂,是能阻止或延缓食品氧化变质,提高食品稳定性和延长贮存期的食品添加剂,在食品生产中常被单独或混合使用。但当BHA、BHT含量过高时,会对人体造成一定的损伤,例如:肝损伤、细胞凋亡、神经性性退变等。
国家标准-气相色谱法:试样中叔丁基茴香醚(BHA)和2,6-二叔丁基对甲酚(BHT)用石油醚提取,通过层析柱使BHA与BHT净化,浓缩后,经气相色谱分离后用氢火焰离子化检测器检测,根据试样峰高比较定量。检测需要时间久,不适合大批量样品含量的测定。
发明内容
为了克服上述现有技术的缺点,本发明的目的在于提供一种油脂类食品中抗氧化剂的快速检测方法,利用合适的显色剂以及试纸材料,可快速检测油脂类食品中抗氧化剂含量,本发明可应用于食品安全筛查中,适合大批量样品的处理。
为了实现上述目的,本发明采用的技术方案是:
一种油脂类食品中抗氧化剂的快速检测方法,其特征在于,步骤如下:
步骤1,将定量滤纸在显色剂中浸泡30min;
步骤2,将氢氧化钠饱和乙醇溶液加到浸泡有试纸的显色剂中,阴干后备用;
步骤3,建立标准比色卡,比色卡上共分六种颜色,分别对应抗氧化剂含量的六个区间;
步骤4,将油脂类的食品进行样品提取,将提取液滴在所述阴干后的试纸上,观察颜色变化,根据比色卡判定抗氧化剂的含量区间,含量越高显色颜色越深。
所述显色剂为2,6-二氯醌-4-氯亚胺。
所述定量滤纸为慢速定量滤纸。
所述六个区间为0.05~0.1g/mL、0.1~0.15g/mL、0.15~0.2g/mL、0.2~0.25g/mL、0.25~0.3g/mL、0.3~0.35g/mL。
所述氢氧化钠饱和乙醇溶液与显色剂的质量之比是(1-10):(10-1),定量滤纸在显色剂中浸泡,显色剂淹没滤纸即可。
所述样品提取采用索氏提取或离心提取,利用无水乙醇和甲醇为提取剂。
与现有气相色谱等技术相比,本发明可以快速检测油脂类食品中的抗氧化剂,适合大批量样品的处理。
附图说明
图1是本发明试纸示意图,其中1表示手握区,2表示检测功能区。
图2是本发明标准比色卡示意图。
图3是本发明实施例中五种不同咸味花生中抗氧化剂利用试纸检测结果示意图。
图4是标准品气相色谱图。
图5是本发明实施例中咸味花生a中抗氧化剂的标准品气相色谱图。
图6是本发明实施例中咸味花生b中抗氧化剂的标准品气相色谱图。
图7是本发明实施例中咸味花生c中抗氧化剂的标准品气相色谱图。
图8是本发明实施例中咸味花生d中抗氧化剂的标准品气相色谱图。
图9是本发明实施例中咸味花生e中抗氧化剂的标准品气相色谱图。
具体实施方式
下面结合附图和实施例详细说明本发明的实施方式。
本发明一种油脂类食品中抗氧化剂的快速检测方法,步骤如下:
步骤1,将慢速定量滤纸在显色剂2,6-二氯醌-4-氯亚胺中浸泡30min;
步骤2,将氢氧化钠饱和乙醇溶液直接加到浸泡有试纸的显色剂中,阴干后备用,所得试纸如图1所示,上部为手握区1,下部为检测功能区2;
步骤3,建立标准比色卡,如图2所示,比色卡上共分六种颜色,分别对应抗氧化剂含量的六个区间,如下表:
0.05~0.1 0.1~0.15 0.15~0.2 0.2~0.25 0.25~0.3 0.3~0.35
步骤4,在20℃以下环境中,将油脂类食品滴在阴干后的试纸上,观察颜色变化,根据比色卡判定抗氧化剂的含量区间,含量越高显色颜色越深(若显色结果在四号色带区域内需进行精确测量)。
利用索氏提取五种不同咸味花生中抗氧化剂,分别标记a、b、c、d、e作为待测液。利用试纸检测结果如图3所示,根据标准比色卡,其含量应分别为0.15,0,0,0.06,0。
利用气相色谱验证,标准品气相色谱图如图4所示。
咸味花生a、b、c、d、e的色谱图分别如图5、图6、图7、图8、图9所示。
下表是不同花生中BHA和BHT含量测定结果,通过试纸检测结果与气相色谱检测结果可得到:试纸与气相色谱检测结果相符合,证明本发明试纸具有一定的可行性。
不同花生中BHA和BHT含量测定结果
编号 BHA RSD% BHT RSD%
1 82.2 4.2 70.1 4.1
2 未检出 - 未检出 -
3 未检出 - 未检出 -
4 32.5 4.5 34.8 4.3
5 未检出 - 未检出 -

Claims (6)

1.一种油脂类食品中抗氧化剂的快速检测方法,其特征在于,步骤如下:
步骤1,将定量滤纸在显色剂中浸泡30min;
步骤2,将氢氧化钠饱和乙醇溶液加到浸泡有试纸的显色剂中,阴干后备用;
步骤3,建立标准比色卡,比色卡上共分六种颜色,分别对应抗氧化剂含量的六个区间;
步骤4,将油脂类的食品进行样品提取,将提取液滴在所述阴干后的试纸上,观察颜色变化,根据比色卡判定抗氧化剂的含量区间,含量越高显色颜色越深。
2.根据权利要求1所述油脂类食品中抗氧化剂的快速检测方法,其特征在于,所述显色剂为2,6-二氯醌-4-氯亚胺。
3.根据权利要求1所述油脂类食品中抗氧化剂的快速检测方法,其特征在于,所述定量滤纸为慢速定量滤纸。
4.根据权利要求1所述油脂类食品中抗氧化剂的快速检测方法,其特征在于,所述六个区间为0.05~0.1g/mL、0.1~0.15g/mL、0.15~0.2g/mL、0.2~0.25g/mL、0.25~0.3g/mL、0.3~0.35g/mL。
5.根据权利要求1所述油脂类食品中抗氧化剂的快速检测方法,其特征在于,所述氢氧化钠饱和乙醇溶液与显色剂的质量之比是(1-10):(10-1),定量滤纸在显色剂中浸泡,显色剂淹没滤纸即可。
6.根据权利要求1所述油脂类食品中抗氧化剂的快速检测方法,其特征在于,所述样品提取采用索氏提取或离心提取,利用无水乙醇和甲醇为提取剂。
CN201811435598.1A 2018-11-28 2018-11-28 一种油脂类食品中抗氧化剂的快速检测方法 Pending CN109540879A (zh)

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CN111323416A (zh) * 2020-04-22 2020-06-23 西安培华学院 一种用于检测抗氧化剂的试纸的制备及应用方法
CN112326640A (zh) * 2019-08-05 2021-02-05 浙江农林大学 一种快速直读显色检测油脂过氧化值的试纸及其制备方法、标准比色卡制备方法及应用

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN112326640A (zh) * 2019-08-05 2021-02-05 浙江农林大学 一种快速直读显色检测油脂过氧化值的试纸及其制备方法、标准比色卡制备方法及应用
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