STUDIES ON AN EFFICIENT METHOD FOR DETERMINING 3,3'-DIMETHYLBENZIDINE IN THE WORKPLACE AIR/BADANIA NAD SKUTECZNA METODA OZNACZANIA 3,3'-DIMETYLOBENZYDYNY W POWIETRZU NA STANOWISKACH PRACY All chemicals used in the analysis; Tris-HCl buffer (Cat # 161-0798, BIO-RAD, USA), sodium acetate ...
NO_2-N is present in the sample, as NO_2-N also reacts with the color regent, 4) temperatures from 5-30 deg C have no effect on the results of the assay, and 5) the reliable concentration range of o-tolidine method is 0.005-3 mg O_3/l with a spectrophotometer using a 1 cm ...
Method: NIOSH 5013, Issue 2; Procedure: high performance liquid chromatography with ultraviolet detection; Analyte: 3,3'-dimethylbenzidine;; Matrix: air; Detection Limit: 3 ug benzidine; per sample. 2.4 Appearance light brown powder (may contain lumps) 2.5 AutoIgnition 526°C 2.6 Storage Light ...
The first method involves reducing ortho-nitrotoluene to 1,2-diorthotolylhydrazine, which is then rearranged with acid. The second method involves reducing o-nitrotoluene using zinc dust and caustic soda, then converting the resulting hydrazotoluene to o-Tolidine by boiling it with hydrochloric acid...
1. Objective To comprehend the sensibitity and specificity of colloidal gold immunization and o tolidine in detecting occult blood in feces. 目的 了解胶体金免疫法与邻甲联苯胺法检测大便隐血的灵敏度和特异性。2) diominoditolyl Dye mordant method 联邻甲苯胺法3) o-tolidine assay 邻联甲苯胺法...
2) neutral orthotolidine method 中性邻联甲苯胺法3) linear potentiometric titration 线性电位滴定法 1. The degree of deacetylation of chitosan is determined by acid-base titration and linear potentiometric titration. 采用酸碱指示剂滴定法和线性电位滴定法测定壳聚糖的脱乙酰度,结果表明线性电位滴定法比...
The syntheses of several thermotropic poly(ester-imide)s were repeated by the "silyl-method". The ... JD Abajo,JGDL Campa,HR Kricheldorf,... - 《European Polymer Journal》 被引量: 64发表: 1992年 The infulence of aromatic diols on thermotropic Poly(ester-amide)s synthesized by direct ...
The determination of residual chlorine with o-tolidine in saline water has been studied. The method proposed is based on the use of reverse flow injection analysis for the monitoring of chlorine in saline samples with low cost and reduction of waste production. The linearity ...
In the present study we have developed a kinetic method to estimate plasma haemoglobin by using o-tolidine. This method is sensitive, rapid, economical, simple and less influenced by interfering substances. It measures plasma haemoglobin in the range of 6 to 400 mg/L (normal range < 50 mg/...
production method of o- tolidine sulfonePROBLEM TO BE SOLVED: To provide a method of more safely, efficiently, and economically producing high-purity o-tolidinesulfone by reacting o-tolidine with fuming sulfuric acid.黒澤 和徳大森 潔福田 康法久森 弘樹...