色质

In comparison with the pure standards and the retention indices RI(subscript s reported in the literature, a total of 302 volatile compounds were identified in Changyu XO brandy, including 30 alcohols, 35 aldehydes and ketones, 20 carboxylic acids, 104 esters, 24 substituted benzenes and derivatives, 14 phenolic derivatives, 14 acetals, 16 furan derivatives, 22 terpenic and norisoprenoidic derivatives and 23 others.

实验先采用液－液萃取方法提取张裕XO级白兰地的挥发性成分，然后将酸性成分与碱性和中性成分分离，再采用柱色谱分离手段将其分离为若干个级分并浓缩，采用气相色谱-质谱、标准品比对、保留指数值比较等方法对分离得到的各级分中的成分进行了鉴定，在白兰地中共鉴定出302种挥发性成分，包括醇30种、醛酮类35种、酸类20种、酯类104种、苯同系物及其衍生物24种、酚类14种、缩醛14种、呋喃类16种、萜烯类22种和其他物质23种。

The neutral/basic fraction was furthermore separated into 4 fractions using silica gel normal phase chromatography, and each fraction was then concentrated and analyzed using gas chromatography-mass spectrometry. In comparison with the pure standards and the retention indices reported in the literature, a total of 302 volatile compounds were identified in Changyu XO brandy, including 30 alcohols, 35 aldehydes and ketones, 20 carboxylic acids, 104 esters, 24 substituted benzenes and derivatives, 14 phenolic derivatives, 14 acetals, 16 furan derivatives, 22 terpenic and norisoprenoidic derivatives and 23 others.

实验先采用液-液萃取方法提取张裕XO级白兰地的挥发性成分，然后将酸性成分与碱性和中性成分分离，再采用柱色谱分离手段将其分离为若干个级分并浓缩，采用气相色谱-质谱、标准品比对、保留指数值比较等方法对分离得到的各级分中的成分进行了鉴定，在白兰地中共鉴定出302种挥发性成分，包括醇30种、醛酮类35种、酸类20种、酯类104种、苯同系物及其衍生物24种、酚类14种、缩醛14种、呋喃类16种、萜烯类22种和其他物质23种。

Therefore, you must use business card printing colorimeters sampling on the timely detection of semi-finished products, to learn about printing seeastigmatism deflexions timely process parameters to control printing color quality in the smallest of changes in the area.

因此，务必在制卡历程洋搁置色不不不不差计不不不不差半制品举行当令抽样检测，不懂印品色不不不不差不正向并准时调动工艺参数，把持印品颜色质度在最小的变冻边界边颠簸。

ESI-MS and HPLC were used to determine molecular weight and composition of amino acids of methionine enkephalin and to check its purity to establish its quality standard.

采用液相色谱－质谱联用仪检测蛋氨酸脑啡肽分子量和鉴别蛋氨酸脑啡肽的各氨基酸组成，反相高效液相色谱测定蛋氨酸脑啡肽含量。

The 9 kinds of elements, 6 kinds of fatty acids and 15 kinds of amino acids in the reddish fish scale were studied by ICP-AES, GC-MS and HPLC in this paper.

用等离子体发射光谱法、气相色谱-质谱联用分析法和高效液相色谱法分别测定了金线鱼鱼鳞中9种元素、6种脂肪酸和15种氨基酸的含量。

Softly encircling the wrist, the strap comes in a light brown, ivory or beige alligator version together with a black satin-finished version, as well as a 18K gold bracelet.

无论是采用浅啡色、象牙色或米黄色的鳄鱼皮表带，或黑色绢质表带，或18K金表链，均温柔地紧贴手腕，散发迷人的腕上风采。

In the contaminated lard sample, 6 organic compounds have been thus identified to be the raw materials or byproducts in the production of organic tin compounds. Based on the identified contaminants, it can be postulated that the chemical structure of the organic tin compound is dibutyltin-bis-(2-isooctyl thioacetate). The method is simple and precise, and has not been reported in the local literature.Keywords Organic tin compound, Lard, SPME－GC－MS

经过摸索研究，采用固相微萃取方法富集挥发性杂质，直接注入色谱中，经色谱分离，质谱测定，确定了杂质的结构，由杂质成分推断生产有机锡所用的原料，然后判断合成路线，最后确定有机锡的结构，从有毒猪油中鉴定出2－巯基醋酸异辛酯、双（2－醋酸异辛酯）二硫、双醋酸异辛酯硫醚等6种与有机锡有关的杂质，并与相应的有机锡工业品对照，发现工业品中也含有这些杂质，与其合成过程的原料及副产物相符，从而确定有机锡化合物为二硫代醋酸异辛酯二丁基锡。

Quality is assured by the identification, characterisation and extensive quality control of our mycotoxin calibrants, using state of the art analytical methods.

质量是有保证的身份，特征和广泛的质量控制我们的霉菌毒素calibrants ，利用先进的分析方法（气相色谱法，高效液相色谱法，核磁共振，红外光谱，质谱）。

The photocopy toners were collected and analyzed with pyrolysis gas chromatography and Py-GC/mass spectrometry.

采用裂解气相色谱技术，对收集到的复印墨粉进行分离分析，并用裂解气相色谱/质谱联用技术，对所得裂解峰进行归属。

The experiment of potted was carried out in the green house and biao-ben orchard of Shandong Agricultural University from 2002.9~2003.6. Aroma components of fruit were extracted by solvent soluble and analyzed by Gas Chromatogram/ Mass Spectrum , to study on the effect on strawberry aroma component under various nitrogen levels. At the same time , glucose and fructose in fruit were analyzed by High Performance Liquid Chromatography, and the correlation between glucose、 fructose and the precursor of strawberry characteristic aroma component was studied according the former article.

本试验于2002年9月~2003年6月分别在山东农业大学日光温室和果树标本园中进行，采用盆栽的方式，用溶剂萃取法提取香气成分，用气相色谱-质谱联用仪进行定性、定量分析，研究了不同氮素水平对草莓果实芳香成分的影响，同时采用高效液相色谱法测定果实葡萄糖、果糖含量，对果实中葡萄糖、果糖与草莓特征香气成分前体之间的关系进行了初步探讨。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。