Protective effect of co-enzyme Q10 on testicular tissue and sperm parameters in adult male rats treated with Sunset Yellow FCF

Objective:To determine the protective effect of co-enzyme Q10(CoQ10)on testicular tissue and sperm parameters in male rats treated with SunsetYellow FCF.Methods:Sixty male Sprague-Dawley rats were randomly divided into 6 groups of the control,CoQ10(10 mg/kg/day),low dose of Sunset Yellow(2.5 mg/kg),high dose of Sunset Yellow(70 mg/kg),low dose of Sunset Yellow(2.5 mg/kg)plus CoQ10,and high dose of Sunset Yellow(70 mg/kg)plus CoQ10.The drugs were administered via daily oral gavages for 6 weeks.At the end of the experiment,sperm analysis,stereological and histological assessments of the testis were carried out.Results:The normal morphology(by 41.1%)and progressive spermatozoa(by 74.8%),testicle volume(by 33.4%),lumen volume(by 38.3%),interstitial tissue volume(by 44.7%),seminiferous tubule volume(by 40.7%),and number of spermatogonia(by 53.9%)and Leydig cells(by 70.7%)reduced in the rats that received high doses of Sunset Yellow in comparison to the control group.Nonetheless,all these alterations were recovered by CoQ10 treatment in the CoQ10 plus high dose of Sunset Yellow group.Furthermore,low doses of Sunset Yellow did not affect different parameters of the testis and sperm.Conclusions:CoQ10 could,to some extent,prevent structural changes of the testis induced by the high dose of SunsetYellow.

Extraction Method and Determination of Sudan I Present in Sunset Yellow FCF by Isocratic High-Performance Liquid Chromatography

A method to extract and analyze Sudan I present in Sunset Yellow FCF (SYF) products was developed and validated. The method included the simple extraction of Sudan I from the SYF product using water, acetonitrile, and ethyl acetate and high-performance liquid chromatography (HPLC) analysis with isocratic elution using acetonitrile:water (7:3) with a photodiode array detector at 485 nm. This method was found to remove most of the excess SYF colorant and other impurities before injection to the HPLC instrument, making it easy to maintain precision control in routine laboratory tests for Sudan I in the SYF colorant. The detection limit of Sudan I in SYF products was 0.2 μg/g. A survey conducted to determine Sudan I in 13 commercial SYF samples from Japanese manufacturers from 1970 to 2010 showed that the levels of Sudan I ranged from 0.3 to 1.9 μg/g in products manufactured from 1970 to 1996 and were below the limit of detection in products manufactured after 2005.

An Amperometric Sensor for Sunset Yellow FCF Detection Based on Molecularly Imprinted Polypyrrole

An electrochemical method for fast detecting the concentration of sunset yellow FCF in wine samples was developed in this study. The sensor based on imprinted films which fabricated by electropolymerization of pyrrole on a glassy carbon electrode in the presence of sunset yellow FCF as the template. Comparing to the polypyrrole non-imprinted modified (NIP) electrode, the polypyrrole molecularly imprinted polymer (MIP) electrode improved the electrochemical performance of the sensor significantly. The peak current at about 0.26 V was linear with the concentration of sunset yellow FCF from 0.4 to 2 μM and from 2 to 8 μM. It can be used for more than 10 times to maintain a stable response result. The sensor had the good selectivity on sunset yellow FCF, amaranth and tartrazine, which the selection factors were 1.00, 0.80 and 0.85,respectively.

基于FeZSM-5催化剂的类Fenton体系氧化降解日落黄FCF研究

采用等体积浸渍法制备FeZSM-5作为异相类Fenton氧化催化剂,使用XRD、FT-IR对FeZSM-5进行表征,探究反应温度、初始pH值、H2O2初始浓度、催化剂用量以及铁负载量对FeZSM-5催化H2O2氧化降解日落黄FCF脱色的影响,考察催化剂循环使用性能。结果表明,铁以Fe2O3形态存在于分子筛孔道内;FeZSM-5催化剂活性受反应温度影响较大,在最适宜条件下,铁负载质量分数为3.5%的FeZSM-5催化剂在FeZSM-5/H2O2类Fenton氧化反应体系中对日落黄FCF模拟废水脱色率达97.0%,且循环使用性能较好。

花生壳粉生物吸附水溶液中阴离子染料的研究

An untried,low cost,locally available biosorbent for its anionic dye removal capacity from aqueous solution was investigated.Powder prepared from peanut hull had been used for biosorption of three anionic dyes,amaranth (Am),sunset yellow (SY) and fast green FCF (FG).The effects of various experimental parameters (e.g.initial pH and dye concentration,sorbent dosage,particle size,ion strength,contact time etc.) were examined and optimal experimental conditions were decided.At initial pH 2.0,three dyes studied could be removed effectively.When the dye concentration was 50 mg·L -1 ,the percentages of dyes sorbed was 95.5% in Am,91.3% in SY and 94.98% in FG,respectively.The ratios of dyes sorbed had neared maximum values in all three dyes when sorbent dose of 5.0 g·L -1 and the sorbent particle size in 80～100 mesh was used.The increasing the ion strength of solution caused the decrease in biosorption percentages of dyes.The equilibrium values arrived at about 36 hour for all three dyes.The isothermal data of biosorption followed the Langmuir and Freundlich models.The biosorption processes conformed the pseudo-first-order rate kinetics.The results indicated that powdered peanut hull was an attractive candidate for removing anionic dyes from dye wastewater.

反相高效液相色谱法同时测定果汁中8种添加剂

建立了反相高效液相色谱法（ＲＰ－ＨＰＬＣ）同时直接测定进口果汁中柠檬黄和苋菜红等８种添加剂含量的方法。色谱柱为Ｈｙｐｅｒｓｉｌ ＢＤＳ Ｃ１８柱（２５０ｍｍ×４．０ｍｍｉ．ｄ，５μｍ），流动相为甲醇／０．０１ｍｏｌ／Ｌ乙酸铵，梯度洗脱，流速为 １．０ ｍＬ／ｍｉｎ，柱温为 ４０℃，ＤＡＤ紫外检测器波长为 ２３０ ｎｍ。在此色谱条件下，各组分在１０ ｍｉｎ内均得到良好分离。平均回收率为 ９０％～１１４％，相对标准偏差 １．３％～８．０％。

循环伏安法快速测定饮料及果冻中柠檬黄和日落黄

以玻碳电极为工作电极、铂柱电极为对电极、饱和甘汞电极为参比电极的三电极体系,利用电化学循环伏安法对5种市售商品中的柠檬黄和日落黄含量进行测定,并对测试方法进行优化。结果表明,在0.1~0.8μg/mL浓度范围内,循环伏安曲线中的峰电流与组分浓度间呈较好的线性关系,5种样品中柠檬黄含量为4.88~6.06 mg/kg,日落黄含量为4.37~5.22 mg/kg,均低于国家限量标准。该方法对柠檬黄和日落黄的检出限分别为1.12,1.43 mg/kg,柠檬黄与日落黄测试结果的相对标准偏差分别为2.1%,2.3%(n=6),当加标浓度为2.0 mg/kg时,目标组分的加标回收率为91.5%~114.5%。

高效液相色谱法同时检测肉制品中4种着色剂

目的建立高效液相色谱法检测肉制品中诱惑红、胭脂红、柠檬黄、日落黄的实验方法。方法采用氨水-乙醇溶液提取,用正己烷脱脂,对氨水乙醇提取液采用定量浓缩仪浓缩。利用液相色谱作为检测手段,紫外检测器分波段采集。结果在0~50.0μg/m L范围内线性良好,4种色素的相关系数均大于0.999,平均回收率为诱惑红78.6%,胭脂红79.2%,柠檬黄78.3%,日落黄79.6%。检出限均为1.0 mg/kg。结论该方法具有样品预处理简单、快速、灵敏度高等特点,可用于肉制品中诱惑红、胭脂红、柠檬黄、日落黄的同时检测。

葛根芩连片中掺入染色剂的检测方法研究

目的：建立葛根芩连片中可能掺入的染色剂含量测定方法,并采用LC-MS/MS方法进行专属性确证。方法：采用HPLC法测定染色剂含量,使用Kromasil C18（4.6 mm×250 mm,5μm）色谱柱,以乙腈-0.05 mol·L-1乙酸铵溶液（含0.5%冰乙酸）为流动相,梯度洗脱,流速1.0 m L·min-1,检测波长为420 nm和500 nm,柱温35℃。用LC-MS/MS进行确证,以乙腈-0.01 mol·L-1乙酸铵溶液为流动相,梯度洗脱;离子源为电喷雾电离源（ESI）,扫描模式为多反应监测（MRM）。结果：建立了HPLC法检测葛根芩连片中可能含有的10种染色剂含量的方法。方法学验证结果表明,柠檬黄、胭脂红、日落黄、亮黄、酸性红73、甲基橙、金橙Ⅱ、金胺O、赤藓红、碱性橙Ⅱ的线性范围分别为1.498 6～49.955 0、0.672 7～22.423 5、1.497 8～49.925 0、0.223 5～7.451 6、0.447 0～14.900 0、0.398 0～13.267 8、0.497 0～16.566 7、0.190 6～6.353 2、0.695 3～23.176 4和0.119 3～3.977 6μg;加样回收率（n=6）分别为97.2%（RSD=0.86%）、99.1%（RSD=0.48%）、98.6%（RSD=0.86%）、101.0%（RSD=1.2%）、98.2%（RSD=0.89%）、98.3%（RSD=1.0%）、97.5%（RSD=0.63%）、96.3%（RSD=0.40%）、97.8%（RSD=1.0%）和96.3%（RSD=0.96%）。在对11个厂家123批样品的检验中,有5个厂家33批样品检出金胺O,检出率为26.8%,含量在0.013～83.51·g·g-1之间,其中1批样品同时检出金胺O和碱性橙Ⅱ。用LC-MS/MS进行专属验证,33批出现HPLC阳性峰样品均检出相应的金胺O和碱性橙Ⅱ。结论：本方法准确、便捷,具有良好的精密度、重现性和稳定性,线性关系良好,可用于葛根芩连片的质量控制。

红花中一种新掺伪染料的确认及6种染色成分检测方法研究

目的:确认红花药材中一种新掺伪染色的染料成分,并建立所发现的6种染色成分的检测方法。方法:采用制备薄层与液相色谱-质谱联用的方法,对染色成分进行鉴定;建立红花药材中柠檬黄、胭脂红、日落黄、偶氮玉红、酸性红73、金橙Ⅱ6种染色成分的TLC、HPLC、LC-MS检测方法。结果:经与对照品对照,确认红花药材中新发现的染色成分为偶氮玉红;107批红花药材中,31批有掺伪染色现象,其中23批为2种以上染料染色。结论:偶氮玉红首次被发现用于红花药材染色;红花药材染色情况呈现多样化、复杂化趋势。