龙海益德工贸有限公司输日荔枝检测出对氯苯氧乙酸（4-CPA）超标（18楼）

应助达人

国内有没有检测这个东东？

怎么都是日本检测超标的？难道出口没有检测

应助达人

因为我在的单位主要是对日本出口蔬菜。

应助达人

Gas Liquid Chromatographic Determination of 4 Chlorophenoxyacetic Acid Residues in Mung Bean Sprouts

Gas-liquid chromatographic determination of 4-chlorophenoxyacetic acid residues in mung bean sprouts.
J Assoc Off Anal Chem 1982 Sep;65(5):1118-21
Wong YS.

A gas-liquid chromatographic (GLC) method is described for determining 4-chlorophenoxyacetic acid (CPA) residues in mung bean sprouts. The residues were extracted from samples by using ethyl acetate followed by liquid-liquid partition into 5% NaHCO3 solution. After acidification and reextraction with ethyl acetate, CPA was reacted with pentafluorobenzyl bromide (PFB-Br) to form the PFB derivative. The reaction mixture was separated on a silica gel column to remove excess reagent, and the derivative was eluted with a solution of 75% toluene in hexane. GLC separations were performed on a 3% OV-1 column at 230 degrees C. As low as 10 pg CPA could be quantitated, which is equivalent to about 0.05 ppm at residue level, using an electron capture detector. Recoveries of CPA from fortified mung bean sprouts (0.05, 0.20, and 0.50 ppm) ranged from 71 to 107%. The PFB derivative was further identified by gas chromatography-mass spectrometry.

应助达人

Degradation of chlorophenoxyacetic acids by the lignin-degrading fungus Dichornitus squalens

文中提到4-CPA的代谢物的检测。

应助达人

色谱柱:Kinetex™ 2.6 µm PFP 100 Å, $$lc Column 50 x 2.1 mm, Ea

尺寸:50 x 2.1 mm ID

洗脱类型:Isocratic

洗脱A:0.1% Formic acid in Water

洗脱B:0.1% Formic acid in Acetonitrile

梯度:

流速:0.8 mL/min

冷却温度:25 °C

检测:UV-Vis Abs.-Variable Wave.(UV) @ 280 nm (25°C)

备注:SecurityGuard™ ULTRA Guard Cartridge System extends column lifetime.
- SecurityGuard ULTRA Cartridges, UHP$$lc PFP for 2.1mm ID Columns, 3/Pk Part No.: AJ0-8787
- Holder Part No.: AJ0-9000

色谱柱:Luna® 3 µm PFP(2) 100 Å, $$lc Column 150 x 4.6 mm, Ea

尺寸:150 x 4.6 mm ID

洗脱类型:Gradient

洗脱A:0.1% Formic acid in Water

洗脱B:0.1% Formic acid in Acetonitrile

梯度:

流速:1 mL/min

冷却温度:室温

检测:UV-Vis Abs.-Variable Wave.(UV) @ 280 nm (22°C)

备注:SecurityGuard™ Guard Cartridge System extends column lifetime.
- SecurityGuard Cartridges, PFP 4 x 3.0 mm, 10/Pk Part No.: AJ0-8327
- Holder Part No.: KJ0-4282

应助达人

高效液相色谱-串联质谱法测定芽苗类蔬菜及其来源豆类中4种非法添加物的残留量

绿豆芽，对氯苯氧乙酸、６-苄基腺嘌呤、恩诺沙星和诺氟沙星

日本检测有没有苛刻的嫌疑

我们也在检测，就是没有去做荔枝。