Usually, synthetic camphor contains more than 95% of camphor as determined by internal standard method.
内标法分析表明，樟脑的含量通常在95%以上。
A method for analysis n-alkanes, steranes and terpanes in oil by internal standard method was established.
采用内标法建立了原油中正构烷烃、生物标志物(甾、萜烷类)的分析方法。
Cyromazine was quantified by an external standard method, and melamine by an internal standard method using melamine-15N3.
环丙胺嗪采用外标法定量，三聚氰胺以三聚氰胺- 15n3为内标定量。
Conclusion: The internal standard method is accurate and reproducible, and suitable for quality control of radix astragali.
结论：建立的内标法准确度高，重复性好，是控制黄芪药材质量的较理想方法。
The internal standard method using a deuterium-labelled analogue as an internal standard makes measurements closer to the true value.
用以氘标记的类似物为内标的内标法可以使测定值更接近真实值。
Besides, quantitation analysis of involatile compositions in beer could be done by internal standard method or by external standard method.
还可用内标法和外标法对啤酒中的不挥发组分进行定量检测分析。
Comparing with the internal standard method, it has the advantages of little solvents, higher precision, fine reproducibility and simpler procedure, etc.
该方法和内标法相比具有溶剂少、快速、精度高、重现性好，操作较简便等优点，至今在国内外文献中尚未有过报道。
A formula is deduced to calculate the contents (absolute or relative) of some elements in a sample by internal standard method with the aid of relative sensitivity factors.
具体给出了用相对灵敏度因子的内标法确定样品中各元素(绝对或相对)含量的计算公式。
The optimal experimental conditions were obtained by matrix element match, background coefficient and element interference coefficient correction as well as element internal standard method.
本体系采用基体匹配、背景系数和元素干扰系数校正及元素内标法确定了最佳综合实验测试条件。
Objective To establish reversed phase HPLC method for simultaneous determination of the concentration of carbamazepine(CBZ)and diltiazem(DZ) in serum, using diazepam as internal standard.
目的建立反相高效液相色谱（HPLC）法，以安定为内标，同时测定血清中卡马西平（CBZ）和地尔硫（DZ）的浓度。
In this paper, the internal and external methods of reproducing roundness standard are introduced. Adapting which standard and reproducing method is discussed.
介绍了国内外复现圆度标准的方法，并就采用何种标准和复现方法进行了讨论。
Why is the internal reference standard method employed for the assay of Vitamin E by GC?
气相色谱测定维生素E含量时为什么使用内标法？
A rapid method of determining 17 sulfonamides residues by using the 13c6-sulfamethazine as an internal standard in the casing was studied by liquid chromatography-tandem mass spectrometry.
建立了一种以13c6 -磺胺二甲基嘧啶为内标快速测定肠衣中17种磺胺类药物残留量的方法。
Internal standard is added, impure elements are determined by spark source mass spectrometry single exposure method.
定量加入内标，利用火花源质谱单曝光法测定杂质元素。
A method for the determination of metofluthrin TC by GC with HP-5 capillary column, diisobutyl phthalate as internal standard and FID detector was described.
本文采用气相色谱法，用HP-5毛细管柱，以邻苯二甲酸二异丁酯为内标物，用氢火焰离子化检测器对甲氧苄氟菊酯进行定性定量分析。
According to internal force influence line theorem author advance the standard calculation method of rigid frame influence line by using programme.
根据结构内力影响线定理提出了一个用程序计算刚架影响线的通用算法。
In this paper, a method for determination pirimicarb combination with triadimefon by gas chromatography was described, by use OV-17 as stationary phase, propenyl phthalate as internal standard.
本文介绍了抗蚜威与三唑酮复配制剂的气相色谱定量分析方法。用OV - 17为固定液，邻苯二甲酸二丙烯酯为内标物进行气相色谱测定。
Part II is an introduction about the composing of our country car internal logistics cost, and analyzes the method and thought of accounting internal logistics cost combining with a national standard.
第二部分介绍了我国轿车企业物流成本的构成，并结合国家标准浅析浅析轿车企业物流成本计算的策略和思路。
A quantitative analytical method of 5% diethylmethylbenzamide in drive-worms floral- water by GC was introduced, Dibutyl Phthalate was selected as internal standard.
本文介绍了以邻苯二甲酸二丁脂为内标物，对5%避蚊胺驱虫花露水进行有效成份测定的气相色谱分析法。
To research the method determining Ca, Ba, Al, Cu in silicon-calcium-barium alloy using Y as internal standard by ICP-AES spectrometer.
用ICP-AES光谱仪、选取钇作为内标，研究测定硅钙钡中钙、钡、铝、铜的方法，建立了最佳的工作条件，并进行回收试验、准确度试验、干扰试验。
An efficient method was developed for the determination of DMS and DMSP by gas chromatography. N-Butyl alcohol was the internal standard. Malt, wort and beer were analyzed with this method.
建立了以正丁醇作为内标物的DMS及DMSP气相色谱测定方法，对啤酒酿造过程中麦芽、麦汁和成品酒进行了检测。
METHOD the plasma samples were pre treated using simple liquid liquid extraction with NR 762 as the internal standard.
方法以NR 762为内标，血浆样品经简单的液液萃取后进行检测。
Objective:To develop a method for determining the metabolites of nitrofuran antibiotics in aquatic products by HPLC-MS/MS using isotope internal standard dilution technique.
目的：建立测定水产品中呋喃唑酮、呋喃它酮、呋喃西林和呋喃妥因等硝基呋喃代谢物的同位素内标稀释高效液相色谱-串联质谱法。
A gas chromatographic method for quantitative and qualitative analysis of chlorempenthrin using a HP-5 capillary column and dibutyl phthalate as internal standard was described.
毛细管柱，以邻苯二甲酸二丁酯为内标物，以氢火焰离子化检测器对杀虫剂氯烯炔菊酯原药进行定性定量分析。
The internal standard and calibration curve method were used for the quantitative analysis.
定量采用内标及校正曲线法。
The internal standard and calibration curve method were used for the quantitative analysis.
定量采用内标及校正曲线法。
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