紫外分光光度法测定二甲硝咪唑片含量

二甲硝咪唑溶于甲醇,在紫外区有明显特征峰。本试验采用紫外分光光度法测定二甲硝咪唑含量,操作简便快速,结果稳定可靠     

紫外分光光度法测定预混剂中二甲硝咪唑的含量

用紫外分光光度法测定二甲硝咪唑预混剂中二甲硝咪唑含量二甲硝咪唑溶解于甲醇中,而载何不 溶,过滤分离出二甲硝咪唑,于２００￣４００ｎｍ间扫描;在３１９ｎｍ和２２８ｎｍ波长处有最大吸收峰,３１９ｎｍ波长处测定吸收度,二甲硝米唑浓度在４￣２４μｇ／ｍｌ范围内与吸收度呈良好的线性关系,符合朗比－比尔定律。用二甲硝咪唑作对照品测得二甲硝咪唑预混剂的平均回收率为１００．００％,ｃｖ＝０．４３％,。ｎ＝１５,方     

紫外分光光度法测定硝氯酚注射液的含量

紫外分光光度法测定硝氯酚注射液的含量权仁子刘同民吉林省兽药饲料监察所长春１３００６２硝氯酚注射液是目前常用的抗牛、羊片形吸虫药。其有效成分硝氯酚的含量测定方法为：经沉淀，加酸还原后，再用重氮化法进行测定〔１〕。操作繁锁，费时。本文采用紫外分光光度法测...     

紫外分光光度法快速测定盐酸左旋咪唑含量

用紫外分光法测定盐酸左酸咪唑含量,确定了测定波长与检测条件。与经典的非水滴定法比较,两法测定结果差异不显著。紫外分光法灵敏度高,操作简便快捷,受环境因素影响小     

用紫外分光光度法测定甲砜霉素散剂的含量

用紫外分光光度法测定甲砜霉素散剂的含量郑依萍于德泰浙江安吉兽药厂浙江安吉３１３３０１甲砜霉素是一种新的合成抗生素，属国家三类新兽药。化学名为〔Ｒ－（Ｒ＊，Ｒ＊）Ｎ－〔１－（羟基甲基）２－羟基－２－〔４－（甲基磺酰基）苯基〕乙基〕－２，２－二氯乙酰胺，...     

紫外分光光度法测定硝氯酚片含量

紫外分光光度法测定硝氯酚片含量刘同民（吉林省兽药饲料监察所）硝氯酚片为兽用常用驱虫药，其含量测定《中国兽药典》（一部９０年版）方法为定氮法，操作费时、繁琐，易致误差。根据硝氯酚分子结构，采用分光光度法，可较好地测定其含量。一、试剂与仪器硝氯酚对照品：...     

紫外分光光度法测定盐酸左旋咪唑片的含量

紫外分光光度法测定盐酸左旋咪唑片的含量吕为庆，徐红伟（山东省兽药监察所）盐酸左旋咪唑，化学名称为１－２，３，５，６－四氢－６－苯基咪唑并［２，１－ｂ］噻唑的盐酸盐，分子式为Ｃ１１Ｈ１２Ｎ２Ｓ·ＨＣ１，为抗蠕虫药。片剂在我省生产，用量较大，中国兽药典一...     

紫外分光光度法测定乙酰甲喹（痢菌净）的含量

紫外分光光度法测定乙酰甲喹（痢菌净）的含量袁群英（湖北省兽药监察所武汉，４３００６４）痢菌净为抗菌药，主要用于密螺旋体所致的猪痢疾、细菌性肠炎。痢菌净化学名为３－甲基－２－乙酰基喹啉－１，４－二氧化物。含量测定有用非水滴定法，但指示剂变色不明显，影响...     

紫外分光光度法测定甲砜霉素原料含量方法的建立

采用紫外分光光度法测定甲砜霉素原料药的含量。实验结果表明,甲砜霉素的最大吸收波长为228nm,在此波长处,甲砜霉素在5．0—20．0μg／mL浓度范围内,其吸光度与浓度呈现良好的线性关系：A=0．0381C-0．1074,R2=0．9992（n=7）。该方法操作简单、快速,结果准确,可用于甲砜霉素原料药的含量测定。     

用紫外分光光度法测定氟甲喹含量

作者应用ＮａＯＨ（０．１ｍｏｌ／Ｌ）为溶液溶解氟甲喹可溶性粉,并以紫外分光光度法测定其含量,结果与容量法无显著性差异。     

二甲硝咪唑盐的合成研究

本文报道以简便易行的方法合成水溶性二甲硝咪唑盐，收率高达95％以上，具工业化应用价值。     

二甲硝咪唑注射液的稳定性研究

从合成得到的水溶性二甲硝咪唑盐配方制备二甲硝咪唑注射液 ,对其进行光加速和热加速稳定性研究。证实本品对光不稳定、对热稳定 ,预测室温 (2 5℃ )避光保存有效期为 3.4 6年     

二甲硝咪唑及其代谢物在猪体内的消除规律

建立了应用HPLC法测定二甲硝咪唑（DMZ）在猪组织中残留的方法。在猪肌肉、肝脏、肾脏、脂肪等组织中添加高、中、低不同量的二甲硝咪唑，HPLC测定的回收率均在80％以上，变异系数在10％以内。肌肉、肝脏、肾脏的最低检测限为10μg/kg，脂肪为50μg/kg。同时研究了二甲硝咪唑在猪组织中残留的消除规律。试验结果认为，二甲硝咪唑在猪体内很快地转变为2－羟甲基硝基咪唑（DMZOH），DMZOH是其主要代谢物。以300、600mg/kg的剂量连续内服5d，停药48h后各组织中均检测不到DMZ及DMZOH。     

地美硝唑盐片剂的制备及体外溶出度

采用紫外分光光度法，对用淀粉、糊精和微晶纤维素等辅料制备的地美硝唑盐片剂和未成盐地美硝唑片剂进行了体外溶出度和释药动力学的比较研究。结果表明，在人工肠液中，两者累积释药50％的时间分别为7.59min和18.26min，前者的溶出速率明显快于后者。本品在45min内可溶解80％以上，释药规律符合Weibull方程。     

二甲硝咪唑在鸡蛋中的残留研究

本文建立了高效液相色谱法(HPLC)测定鸡蛋中二甲硝咪唑(DMZ)残留水平的方法.产蛋鸡内服50 mg/kgbw和200 mg/kgbw、肌注50 mg/kgbw二甲硝咪唑,连用5 d.测定了用药期间及停药后蛋清及蛋黄中DMZ及其羟基代谢物(DMZOH)的含量,方法检测限为0.01μg/g.鸡蛋中DMZ及其DMZOH的含量在休药6～7 d时低于检测水平.排泄到蛋黄中的二甲硝咪唑及其羟基代谢物约占鸡蛋中残留总量的56%,蛋清约占44%.     

A Quantitative Review of the Equinalysis System for Equine Locomotion Analysis

Movement analysis techniques allow objective and quantitative assessment of kinematic gait analysis. Consistent repeatability of the kinematic data is essential for such assessments. This study investigated whether the repeatability of a standardized Equinalysis Elite gait analysis system is sufficient to allow its use in clinical evaluation of equine lameness with reliable documentation of individual locomotion patterns. The extent to which examinations on different days affected the results when a standardized protocol was used was investigated. The repeatability of distal limb kinematics in nine sound horses over three successive days at one location was investigated. Measurements were performed at the examination area, for three motion cycles at the walk and trot, in each direction per day. Skin markers were placed on the lateral aspect of the coffin joint, forelimb fetlock joint, hindlimb fetlock joint, carpus, tarsus, elbow, and stifle, at clipped sites marked with a permanent marker. The inter-day repeatability of angular measurements of the carpus, tarsus, forelimb fetlock, and hindlimb fetlock joints was determined. A low degree of inter-day repeatability was found with statistically significant (P ≤ .05) differences between findings on different days, observed in the time-angle diagrams of left and right carpus, tarsus, forelimb fetlock, and hindlimb fetlock joints of all horses, at both walk and trot. The standardized Equinalysis Elite system for gait analysis of distal limb kinematics in the horse did not provide highly repeatable data in this setting.     

HPLC同时测定复方二甲硝咪唑可溶性粉中地美硝唑、甲氧苄啶、磺胺对甲氧嘧啶的含量

建立同时测定复方二甲硝咪唑可溶性粉中地美硝唑、甲氧苄啶、磺胺对甲氧嘧啶含量的高效液相色谱法.采用Discovery C18色谱柱(250 mm×4.60 mm,5 μm);以0.1%磷酸溶液-乙腈(90:18)为流动相;检测波长为230 nm;流速为1.0 mL/min;进样量为10 μL.地美硝唑在20μg/mL～1...     

A Quantitative Flurometric Assay for the Measurement of Antibody to Pasteurella haemolytica in Cattle

A rapid, simple fluorometric method is described for measuring antibody to Pasteurella haemolytica in sera of cattle. Various antigen preparations were compared for the test including live, formalin-killed and phenol-killed P. haemolytica. A preparation composed of formalin-killed organisms from a 22 hour culture gave consistent results and was used in the studies. The test was reproduciable with percent coefficients of variation for fluorescent signal unit values on ten or more replicate samples ranging from 5.7 to 28.0. Sera from calves vaccinated by aerosol exposure to live P. haemolytica had up to a five-fold increase in antibody titer as measured by the flurometric method test during a 21 day period. Fluorometric method titers were comparable to those obtained by the indirect bacterial agglutination test. There was no seroconversion to P. haemolytica in calves vaccinated by aerosol exposure of P. multocida. The major advantages of the fluorometric method test over conventional methods are that the assay does not require serial dilutions of serum samples and thus limits time and effort to determine antibody titers.