absorbance ratio

Progress of application of pH indicator absorbance ratio method in drug analysis

吸光度比法在国内药物分析上应用的进展

METHODS: With the wavelengths of 265,270,274, and 278 nm as determinable points, the multiwavelength absorbance ratio difference spectrophotometry was used.

方法：应用多波长吸光度比值差法，测定波长为265、270、274、278nm。

The pH indicator absorbance ratio method was applied satisfactorily to the quantitative determination of metronidazole. The RSD was within 0.2%.

以0.1%桔黄Ⅳ为指示剂，采用pH指示剂吸收度比值法测定甲硝唑的含量，RSD小于0.2%，结果满意。

The higher the absorbance ratio of Bronsted acid peak to Lewis acid peak ( i.e.AB/ AL) measured by infra-red absorption spectrum, the higher is the catalyst activity. The results show clearly that the Bronsted acid plays a dominant role in catalytic cracking reaction.

用红外光谱法测定了Bronsted酸峰与Lewis酸峰的吸光度（A）的比值，发现活性高的催化剂，其A B/A L值也高，说明在催化裂化反应中，Bronsted酸起主导作用。

Determination of Penciclovir Sodium by pH-Indicator Absorbance Ratio Method

pH指示剂吸光度比法测定喷昔洛韦钠原料药含量

Methods pH indicator absorbance ratio method was used. Absorbance values at lengths of 374 nm and 494 nm were determined.

方法采用pH指示剂吸收值比值法，在波长374nm和494nm处测定吸收度。

Studies on Multiwavelength absorbance ratio difference spectrophotometry and its application

多波长吸收度比值差法的研究与应用

Multiwavelength absorbance ratio difference spectrophotometry as a new method to determine two-mixed system was used injection.

多波长吸收度比值差法是一种可对多种混合组分同时测定的新的分光光度法.

Assay of atropine sulfate by the pH indicator absorbance ratio method

pH指示剂吸收值比值法测定硫酸阿托品

Absorbance ratio K-factor spectrophotometry is a new method to determine mixed components system.

吸光度比值K系数法是一种可以同时测定多元混合组分的新的分光光度法。

The pH indicator absorbance ratio method was applied to the quantitative determination of clotrimazole.

本文报道pH指示剂吸收度比值法测定克霉唑的含量。该法采用指示剂为稀溴酚蓝，测定波长433nm和599nm；

Determination of LAEVODOPA by the method of pH indicator absorbance ratio

pH指示剂吸收度比值法测定左旋多巴

Metronidazole was determined quantitatively by pH indicator absorbance ratio method.

采用pH指示剂吸收比值法测定甲硝唑的含量，以麝香草酚蓝为指示剂，432nm和544nm为测定波长。