Determination of diethyl phthalate and polyhexamethylene guanidine in surrogate alcohol from Russia [0.03%]
俄罗斯仿制酒精中邻苯二甲酸二乙酯和聚六亚甲基胍的测定
Yulia B Monakhova,Thomas Kuballa,Jenny Leitz et al.
Yulia B Monakhova et al.
Analytical methods based on spectroscopic techniques were developed and validated for the determination of diethyl phthalate (DEP) and polyhexamethylene guanidine (PHMG), which may occur in unrecorded alcohol. Analysis for PHMG was based on...
Comparison of two methods for assaying reducing sugars in the determination of carbohydrase activities [0.03%]
酶活测定中两种还原糖测定法的比较研究
Alexander V Gusakov,Elena G Kondratyeva,Arkady P Sinitsyn
Alexander V Gusakov
The Nelson-Somogyi (NS) and 3,5-dinitrosalicylic acid (DNS) assays for reducing sugars are widely used in measurements of carbohydrase activities against different polysaccharides. Using twelve commercial enzyme preparations, the comparison...
Spectrophotometric determination of N-acetyl-L-cysteine and N-(2-mercaptopropionyl)-glycine in pharmaceutical preparations [0.03%]
药物制剂中N-乙酰半胱氨酸和N-(2-硫基丙酰)甘氨酸的分光光度测定法
Lea Kukoc-Modun,Njegomir Radić
Lea Kukoc-Modun
A simple spectrophotometric method for the determination of N-acetyl-L-cysteine (NAC) and N-(2-mercaptopropionyl)glycine (MPG) in pharmaceutical preparations was developed, validated, and used. The proposed equilibrium method is based on a ...
Detection of total phenol in green and black teas by flow injection system and unmodified screen printed electrode [0.03%]
采用未改性的屏幕印刷电极和流动注射系统检测绿茶和红茶中的总酚含量
Ivanildo Luiz de Mattos,José Heraclito Zagal
Ivanildo Luiz de Mattos
A flow injection system using an unmodified gold screen-printed electrode was employed for total phenol determination in black and green teas. In order to avoid passivation of the electrode surface due to the redox reaction, preoxidation of...
Tae-Kee Hong,Myung-Hoon Kim,Myung-Zoon Czae
Tae-Kee Hong
A new method for determining chlorinity of water was developed in order to improve the old method by alleviating the environmental problems associated with the toxic chromate. The method utilizes a mediator, a weak acid that can form an ins...
Quantitation by Portable Gas Chromatography: Mass Spectrometry of VOCs Associated with Vapor Intrusion [0.03%]
便携式气相色谱-质谱法定量挥发性有机物及其与蒸气入侵关联性研究
Justin D Fair,William F Bailey,Robert A Felty et al.
Justin D Fair et al.
Development of a robust reliable technique that permits for the rapid quantitation of volatile organic chemicals is an important first step to remediation associated with vapor intrusion. This paper describes the development of an analytica...
Determination of the levels of polycyclic aromatic hydrocarbons in toasted bread using gas chromatography mass spectrometry [0.03%]
采用气相色谱-质谱法测定烤面包中多环芳烃的含量
Amal Al-Rashdan,Murad I H Helaleh,A Nisar et al.
Amal Al-Rashdan et al.
Concentration of 16 polycyclic aromatic hydrocarbons (PAHs) in eighteen baked bread samples using gas oven toasting were evaluated in this study. Samples were classified into the following categories: (1) bread baked from white wheat flour,...
A Validated RP HPLC-PAD Method for the Determination of Hederacoside C in Ivy-Thyme Cough Syrup [0.03%]
一种用于葎草-香藻咳嗽糖浆中 Hedercoside C 定量的RP-HPLC方法研究与验证
Ayman Khdair,Mohammad K Mohammad,Khaled Tawaha et al.
Ayman Khdair et al.
A simple reversed phase high-performance liquid chromatographic (RP-HPLC) method coupled with a photodiode array detector (PAD) has been developed and validated for the analysis of hederacoside C, the marker of ivy plant, in Ivy-Thyme cough...
Use of Tetra-ammonium Tetrakis(4-Sulphonato)Phenyl Porphyrin for Pseudomonas and Bacillus Cell Imaging [0.03%]
四铵四(4-磺酸苯基)卟啉的荧光成像及其对假单胞菌和芽孢杆菌染色的应用研究
V Sujatha,Bharat Sridhar,Srinath Krishnamurthy et al.
V Sujatha et al.
The use of tetraammonium tetrakis(4-sulphonato)phenyl porphyrin (TPPS), a water-soluble anionic compound, as a stain to analyse bacterial cells using fluorescent microscopy was investigated. TPPS was effectively used to analyse two differen...
Agreement of immunoassay and tandem mass spectrometry in the analysis of cortisol and free t4: interpretation and implications for clinicians [0.03%]
免疫测定与串联质谱在皮质醇和游离T4分析中的一致性：解释及对临床医生的意义
Rochelle E Tractenberg,Jacqueline Jonklaas,Steven J Soldin
Rochelle E Tractenberg
Objective. To quantify differences in results obtained by immunoassays (IAs) and tandem mass spectrometry (MSMS) for cortisol and free thyroxine (FT4). Design & Patients. Cortisol was measured over 60 minutes following a standard ACTH stimu...