复方磺胺甲噁唑片含量的不同测定方法

复方磺胺甲噁唑是磺胺甲噁唑(SMZ)和甲氧苄啶(TMP)的复方制剂,为抗菌药,临床主要用于生殖-尿路、呼吸道、胃肠道及皮肤感染等的治疗。复方磺胺甲噁唑片含量的测定方法很多,有HPLC法、双波长薄层扫描法、高效毛细管电泳法、一阶导数光谱法等,并对其评价。     

系数倍率法同时测定复方磺胺甲噁唑片中磺胺甲噁唑和甲氧苄啶的含量

目的建立复方磺胺甲噁唑片中磺胺甲噁唑（SMZ）和甲氧苄啶（TMP）的含量测定方法。方法采用系数倍率法,分别在235nm和257nm处测定吸光度,从而测定复方磺胺甲噁唑片中SMZ和TMP的含量。结果 SMZ的线性范围为6～16μg.mL-1（r=0.9994）,平均回收率为98.07%,RSD为0.65%（n=6）;TMP的线性范围为1.2～3.2μg.mL-1（r=0.9987）,平均回收率为98.91%,RSD为0.66%（n=6）。结论该法简便易行、重现性好、结果可靠,可用于该制剂的质量控制。     

HPLC同时测定复方磺胺甲噁唑片的两个主药含量

目的建立复方磺胺甲噁唑片中磺胺甲噁唑(sohamethoxazole,SMZ)和甲氧苄啶(trimethoprim,TMP)的HPLC测定方法。方法采用高效掖相色谱法,色谱柱:waters C18(4μm,3.9mm×150mm)柱,流动相为乙腈-磷酸缓冲液(pH6.8±0.1),(12∶88),检测波长为240nm。结果在优化的色谱条件下,SMZ和TMP完全分离,片剂辅料不干扰测定,SMZ在20～100μg/mL范围内呈良好线性关系(r=0.9999),TMP在4～20μg/mL范围内呈良好线性关系(r=0.9999)。ASD<1.5%。结论该法结果准确、简便、快速、专属性强,重复性好,敏感度高,适用于复方磺胺甲噁唑片的含量测定。     

双波长一元线性回归分光光度法同时测定复方磺胺甲噁唑片中两组分含量

本文采用双波长一元线性回归分光光度法同时测定了复方磺胺甲噁唑片中SMZ和TMP的含量,分析结果表明:平均回收率SMZ为99.9%,TMP为100.2%,变异系数SMZ为0.25%,TMP为0.76%。     

双波长系数倍率法测定复方新诺明片中甲氧苄啶的含量

利用磺胺甲(口恶)唑(SMZ)和甲氧苄啶(TMP)在0.05 mol/LH_2SO_4中溶解度的不同,将其不完全分离,降低干扰组分 SMZ 的比例,再用双波长系数倍率法消除其干扰,测定 TMP 的含量。浓度 C 与△A 线性关系良好。相关系数 r=0.9999,平均回收率99.4%,cv=0.72%。     

转换曲线分光光度法测定复方磺胺甲(口恶)唑片的含量

目的:研究复方磺胺甲(口恶)唑片更简便的含量测定方法.方法:用转换曲线分光光度法原理,以乙醇-0.1mol·L-1盐酸(1∶1)为溶剂,直接测定复方磺胺甲(口恶)唑片中SMZ和TMP的含量.结果:SMZ及TMP的平均回收率和RSD(n=6)分别为(100.0±0.22)%和(99.88±0.90)%.结论:方法简便、快速、准确.     

HPLC法测定复方磺胺甲噁唑颗粒剂的含量

目的:采用HPLC法同时测定复方磺胺甲噁唑颗粒剂中磺胺甲噁唑(SMZ)和甲氧苄啶(TMP)的含量。方法:色谱柱为ODS C_(18)柱,4.6x150mm,流动相为甲醇-磷酸盐缓冲液(pH5.90)(20:80),检测波长为240nm。结果:线性范围分别为:SMZ 20～181μg·ml~(-1),(r=0.9999);TMP 4～38μg·ml~(-1),(r=0.9999)。平均回收率分别为:SMZ100.5％(RSD=0.29％);TMP 100.3％(RSD=0.51％)。结论:本法分离度好,快速,简便,可同时测定该品中的两种组分。     

RP-HPLC同时测定小儿复方磺胺甲噁唑片中两组分的含量

目的建立同时测定小儿复方磺胺甲噁唑片中磺胺甲噁唑(SMZ)和甲氧苄啶(TMP)的含量的反相高效液相色谱法.方法采用Kromasil C18色谱柱,以0.025 mol/L磷酸溶液(用20%氢氧化钠调节pH 3.0±0.5)-乙腈(75∶25)为流动相,流速:1.0 ml/min,检测波长:240 nm.结果 SMZ在20～200 μg/ml范围内,峰面积与其浓度线性关系良好(r=0.9997),加样回收率为100.1%;TMP在 4～40 μg/ml范围内,峰面积与其浓度线性关系良好(r=0.9999),加样回收率为96.0%.结论本法操作简便、专属性强.     

近红外光谱—偏最小二乘方法同时测定复方磺胺甲唑片的两种有效成分

目的建立复方磺胺甲口恶唑片的两种有效成分磺胺甲口恶唑(SMZ)和甲氧苄啶(TMP)的快速同时测定方法。方法基于近红外漫反射光谱技术,利用偏最小二乘方法建立该复方中SMZ和TMP的定量分析多元校正模型。结果对于所建立的SMZ与TMP模型,相关系数分别为:100.00%与100.00%;校正集残差分别为:0.0163与0.008 36;预测均方差分别为:0.156与0.0815。结论本方法在样品不经任何预处理的情况下,实现了该制剂的两种有效成分SMZ和TMP的简单、快速、两组分同时准确测定。     

RP-HPLC同时测定小儿复方磺胺甲噁唑片中两组分的含量

目的　建立同时测定小儿复方磺胺甲噁唑片中磺胺甲噁唑(SMZ)和甲氧苄啶(TMP)的含量的反相高效液相色谱法。方法　采用KromasilC18色谱柱,以0. 025mol/L磷酸溶液(用20%氢氧化钠调节pH 3. 0±0. 5) 乙腈(75∶25)为流动相,流速: 1. 0ml/min,检测波长: 240nm。结果　SMZ在20~200μg/ml范围内,峰面积与其浓度线性关系良好(r=0. 9997),加样回收率为100. 1%;TMP在4~40μg/ml范围内,峰面积与其浓度线性关系良好(r=0. 9999),加样回收率为96. 0%。结论　本法操作简便、专属性强。     

Chemometric and derivative methods as flexible spectrophotometric approaches for dissolution and assaying tests in multicomponent tablets

Two derivative spectrophotometric (ratio derivative spectra and algorithm bivariate calibration) and a chemometric methods (partial least squares, PLS) are proposed for the simultaneous determination of binary mixtures in tablet analysis and dissolutions tests, without prior separation. These approaches are successfully applied to quantify trimethoprim (TMP) combined with sulfamethoxazole (SMX) or sulfamethazine (SMZ) or sulfafurazole (SFZ) using the information in the absorption spectra of appropriate solutions. Beer's law was obeyed in the concentration range of 0.98-17.5 microg/ml for TMP, 0.95-17.2 microg/ml for SMX, 1.16-17.5 microg/ml for SMZ and 0.97-17.4 microg/ml for SFZ. The first derivative (1D) bivariate algorithm method involves the use of four calibration curves: two for each compound at two different wavelengths, selected by Kaiser's method. Similarly, the first derivative ratio spectrophotometry employs the linear relationship between the ratio spectra of the analytes and the concentration range. The results were compared with those obtained by PLS multivariate calibration. The calibration models from PLS were pre-treated by orthogonal signal correction and evaluated by cross-validation using the 'SIMCA-P 9' software. Synthetic mixtures of TMP and sulfonamides were used in five different sets for the validity of the calibrations. Mean recoveries for derivative ratio, derivative bivariate and PLS methods were found to be between 99.7% and 102.0% for TMP, 99.4% and 100.2% for SMX, 99.3% and 101.0% for SMZ and 98.1% and 102.3% for SFZ. The calibrations of the three methods were successfully applied to the assaying and dissolution of placebo and commercial tablets without any prior separation. More than 85% of TMP, SMX and SMZ were dissolved within 15 min. For SFZ, only 85% of the compound was dissolved after 60 min. In this study, the three spectrophotometric methods can be satisfactorily used for the quantitative analysis and for dissolution tests of multicomponent dosage forms.     

正交投影分光光度法测定泻痢停片中TMP和SMZ的含量

目的：建立泻痢停片中TMP和SMZ的含量测定方法。方法：通过正交投影算法消除混合物光谱中干扰组分的光谱,直接测定泻痢停片中的TMP和SMZ的含量。结果：TMP和SMZ的平均回收率分别为99．91％和99．63oA,RSD分别为0．14％和0.61％,样品测定结果与标准方法比较,经t检验（n=6,P〉0．05）表明二者无显著性差异。结论：正交投影分光光度法测定泻痢停片中TMP和SMZ的含量,简便、准确、实用。     

差示—线性组合导数光谱法测定扑咳灵片中扑尔敏和溴化丙胺太林

本文提出了差示一线性组合导数光谱法用于测定混合组分体系的基本原理和实验方法。并试用本法消除了扑尔敏、溴化丙胺太林、灵芝粉及附加剂之间的相互干扰,从而分别测定了扑咳灵片巾扑尔敏和溴化丙胺太林的含量,其平均回收率分别为100.2±1.49%(CV)和99.89±1.03%(CV)。其精密度、准确度均好。     

Pharmacokinetics of the trimethoprim-sulphamethoxazole combination in the elderly.

The pharmacokinetics of a co-trimoxazole preparation (Bactrim Forte) containing trimethoprim (TMP) 160 mg and sulphamethoxazole (SMZ) 800 mg were determined in six young adults (29.3 +/- 4.4 s.d. years) and six elderly people (78.6 +/- 6.6 s.d. years). Following oral administration of a single dose, the pharmacokinetic parameters of SMZ and its N4-acetylated metabolite (N4SMZ) were similar in both groups. However Cmax of TMP was greater (2.06 +/- 0.29 s.d. vs 1.57 +/- 0.32 s.d. mg l-1; P less than 0.01) and its area under the curve was larger (34.30 +/- 6.98 s.d. vs 23.87 +/- 3.82 s.d. mg l-1 h; P less than 0.001) in elderly people than in younger subjects. Total clearance (CL/F) of TMP normalized to body weight was not significantly different in the two groups. There was no significant difference in serum protein binding of TMP and SMZ between the two groups. Urinary excretion of TMP, SMZ and N4SMZ was reduced by about 50% in the elderly compared to the young subjects. Renal clearance of TMP was significantly lower in the elderly group (19 +/- 10 s.d. vs 55 +/- 14 s.d. ml h-1 kg-1; P less than 0.001). Renal clearance of SMZ was not significantly different in the two groups. A study of plasma concentrations of TMP, SMZ and N4SMZ during continuous dosing in seven elderly patients treated for urinary or respiratory infections showed that steady state was reached after 3 days of treatment and that plasma drug concentrations were about two to three times higher than those observed after a single dose.     

HPLC法测定复方新诺明片含量

采用ＨＰＬＣ法测定复方新诺明片两组含量。以０．０３ｍｏｌ／Ｌ’磷酸－甲醇为流动相,流速１．２ｍｌ／ｍｉｎ,检测波长２５４ｎｍ。测得平均回收率ＳＭＺ为９８．８２％,ＣＶ＝１．６９％;ＴＭＰ为１０１．０１％,ＣＶ＝２．２３％。     

The relative bioavailability of co-trimoxazole suspensions

The relative bioavailability of a co-trimoxazole suspension manufactured by VEB Berlin-Chemie (B); Belocid-Suspension was compared with a widespread used suspension (V) in healthy male students (22-29 ys. aged). A single oral dose of 160 mg trimethoprim (TPM) and 800 mg sulphamethoxazole (SMZ) produced similar blood levels with either preparation. The TMP peak levels were 1.44 +/- 0.18 (B) and 1.40 +/- 0.26 mg/l (V), respectively after 1.5 and 1.0 h on an average. The AUC amounted to 18.94 +/- 2.25 (B) and 17.19 +/- 3.62 mg . h/l (V), respectively. About one half (52.5%) of the given TMP dose was excreted unchanged by kidney within 48 h after administration of the respective suspension. The SMZ peak levels run to 37.2 +/- 10.3 (B) and 38.6 +/- 5.4 mg/l (V) after 3.6 +/- 3.5 and 1.3 +/- 0.8 h. The AUC were identical: 682.3 +/- 126.2 (B) vs. 686.9 +/- 165.8 mg . h/l (V). After both preparations 67% of the given SMZ dose could be detected in urine within 48 h. In two out of the eight volunteers the absorption of B was delayed, but it passed off to the same extent. In all other cases absorption of the suspension was accelerated in comparison with tablet administration studies reported. Peak blood levels of TMP and SMZ after ingestion of the suspensions reach the lower range of values resulting from tablet intake. Both suspensions are regarded interchangeable with respect to bioavailability, which is also comparable to co-trimoxazole tablets.     

卡尔曼滤波分光光度法测定复方维生素B片四组分含量

复方维生素B片中的主要成分维生素B₁,B₂,B₆及烟酰胺各具有一定的不稳定性,且配方比例差较大,因而给多组分同时测定带来一定的困难。本文研究了应用卡尔曼滤波分光光度法同时测定复方维生素B片中的主要成分的可行性,并在处理由于分子间的相互作用引起的吸收度偏离Beer-Lambert定律的现象作了探索,得到较满意的结果。维生素B₁,B₂,B₆及烟酰胺的回收率分别是:100.2±0.90%(CV),100.3±1.7%(CV),101.1±3.3%(CV),99.90±0.65%(CV)。较已有的报道结果均好,表明方法可行。     

Trimethoprim/sulfamethoxazole does not affect the steady-state disposition of indinavir.

This study evaluates the safety and potential pharmacokinetic interaction between indinavir and trimethoprim/sulfamethoxazole (TMP/SMZ). In a randomized, three-period crossover fashion, 12 healthy adults received 1 week of indinavir sulfate 400 mg orally every 6 hours with placebo, TMP 160 mg/SMZ 800 mg orally every 12 hours with placebo, and indinavir sulfate with TMP/SMZ. Plasma indinavir, SMZ, and TMP concentrations were determined after the last dose of each treatment period. Concomitant administration resulted in a 17% decrease in geometric mean trough plasma indinavir concentrations (p = 0.032), an 18% increase in geometric mean AUC0-12 h and Cmax TMP values (p = 0.031 and 0.030, respectively), and a 5% increase in geometric mean AUC0-12 h SMZ values (p = 0.039). None of these effects was considered clinically significant. The combination of indinavir sulfate and TMP/SMZ is generally well tolerated, with no clinically significant pharmacokinetic interaction being noted.     

系数倍率导数光谱法和等导数值导数光谱法测定息热痛注射液中盐酸异丙嗪和对乙酰氨基酚

本文提出了系数倍率导数光谱法和等导数值导数光谱法用于混合组分体系测定的基本原理和实验方法。并试用本法消除盐酸异丙嗪、对乙酰氨基酚,维生素C及附加剂之间的相互干扰,从而分别测定了息热痛注射液中的盐酸异丙嗪、对乙酰氨基酚的含量,其平均回收率分别为:99.99±0.53%(CV)和99.84±0.91%(CV)。其精密度、准确度均较满意。     

双波长倍增差示法测定复方新诺明片含量

分别测定标准溶液和样品溶液在265及275 nm处的吸收度,根据标准溶液的吸收系数可同时计算出样品中 SMZ 和 TMP 的含量。SMZ 平均回收率与变异系数分别为100.8%,0.95%;TMP 为99.16%,0.82%。方法简便、快速。结果令人满意。