Normal and reverse flow injection-spectrophotometric determination of thiamine hydrochloride in pharmaceutical preparations using diazotized metoclopramide

Simple and sensitive normal and reverse flow injection methods for spectrophotometric determination of thiamine hydrochloride (THC) at the microgram level were proposed and optimized. Both methods are ...     

Spectrophotometric detection of diethylstilbestrol on the basis of the plasmon resonance absorption of silver nanoparticles

In this study, a spectrophotometric detection method for diethylstilbestrol (DES) was proposed by reducing silver nitrate (AgNO3) to obtain silver nanoparticles (AgNPs) in the medium of ammonia and sodium hydroxide. It was found that the resulting AgNPs have plasmon resonance absorption (PRA) characteristic at 415 nm, and the PRA is proportional to the increase of DES concentration in the range of 4.0×10-8-1.0×10-5M with the detection limit (3σ) of 1.2×10-7M. Most of the coexisting substances at high concentrations did not affect the detection of real samples, such as tablets. The recovery was in the range of 96.01%-107.41% and the RSD was lower than 4.7%. This method can be successfully applied to control preparation quality of DES.     

用火焰原子吸收法测定易切削钢中的含钙量

试样用非氧化性酸溶解,加入磺基水杨酸作干扰抑制剂,然后应用原子吸收分光光度法中的标准加入法测定易切削钢中的含钙量。     

红外光谱法在船舶溢油鉴别中的应用

本文介绍船舶溢油红外光谱鉴别工作,叙述了溢油的预处理、油品的模拟风化、光谱视觉覆盖法鉴别溢油以及红外光谱法在船舶溢油鉴别中的应用。     

氯和二氧化氯的快速测定

根据氯和二氧化氯与碘化钾反应生成碘，而碘在460nm波长下有最大吸收峰的特点，提出了快速测定氯和二氧化氯的方法，并对其测定方法、范围及离子干扰等进行了研究，结果表明，在中性及酸性条件下，其吸光度与浓度之间有显著的线性关系，用3cm比色皿可测定0.4～35mg/L范围内氯的浓度，可测定0.16～13mg/L范围内二氧化氯的浓度。     

L-赖氨酸锌和葡萄糖酸锌的药物动力学研究

用原子吸收分光光度法,测定口服L—赖氨酸锌(Zinc L-lysinate)和葡萄糖酸锌(Zinc Glucosate)在家兔体内的血清锌浓度,并计算了它们的药代动力学参数。实验结果表明,葡萄糖酸锌在兔体内处置过程为一级动力学二房室模型,而L—赖氨酸锌近似于一级动力学一房室模型。二者的主要药代动力学参数分别为:葡萄糖酸锌,t_(1/2)(β)9.49h,T(p)1.3h,V/F(c)41.13 1/kg,Cl(S)13.14 1/kg.h,AUC 15.07 mg/kg·h;L—赖氨酸锌,t_(1/2)(ke)1.01h,T(p)1.08h,V/F 57.85 1/kg,Cl/F(s)39.631/kg·h,AUC 5.24mg/kg·h。     

催化动力学光度法测定水中痕量钒的研究与应用（II）—V5^…

在柠檬酸介质中：Ｖ＾５＾＋强烈 地催化ＫＢｒＯ３氧化甲基红的反应，据此建立了催化动力学光度法奶量Ｖ＾５＾＋的新方法。本文方法的检出限为０．１２ｎｇ／ｍｌ，测定范围为０－６．４ｎｇ／ｍｌ，并用本法对地下水进行了分析。