Six new sensitive indicator systems for the determination of palladium by back titration of triethylenetetramine hexaacetic acid at different pH values have been given in this work.
提出了在不同pH值下，络合返滴定三乙撑四胺六乙酸以测定钯的六个灵敏新指示剂体系；建立了以镧－DBS－偶氮氯膦作为络合滴定指示剂体系，研究了TTHA－Pd 络合物的特性及反应机理。
The principle of the measurement is based on the time disappearance of a yellow spot on the pH indicator wafer.
检测原理是基于下层膜上黄色斑点的消失时间进行的。
In the NaH2PO4-Na2HPO4 solution, in which the pH indicator is 6.17, can form ionic compound with the bromine cresol green and cationic surfactants: cetyltrim ethylammonium bromide ammonium or cetylpyridinium bromide, the blue colors of solutions fade obviously. The cationic surfactants can be used for determining in the water body.
在pH值为6.17左右的NaH2PO4-Na2HPO4溶液中，溴甲酚绿与阳离子表面活性剂：十六烷基三甲基溴化铵、溴化十六烷基吡啶形成离子缔合物，溶液蓝色减褪。
Prolific test result increases as pH indicator of tomato red element, expression of Bax gene MRNA increases and the MRNA expression of Bcl-2 decreases.
结果实验结果随着番茄红素浓度的增加，bax基因mRNA表达增加而bcl-2的mRNA表达减少。
Although soil pH is an excellent indicator of soil acidity, it does not determine lime requirement.
虽然土壤pH是土壤酸度很好的指标，但并不能确定出石灰需要量。
Assessment indicator system include fertility indicator and heavy metal indicator, thereinto the fertility indicator include organic matter, pH, available N, Olesen-P and available K, heavy metal indicator include Cd, Cr, Pb and Hg.
评价指标包括土壤肥力指标和重金属指标，其中土壤肥力指标包括有机质、速效磷、速效钾、碱解氮；重金属指标包括铜、铅、镉、铬。
Phenolphthalein An acid-alkali indicator that is colorless in acids and red in a1kalis.
酚酞：一种酸碱指示剂，在酸中无色，碱中呈红色，其pH值范围为8.4～10.0。
The merits of using mixed indicator lie in the high sensitivity, obvious reaction phenomena and visible effect.
用混合指示剂指示反应，其优点是：变色范围窄(pH5.2～5.6)且灵敏；反应现象直观，能增强学生的感性认识。
To check the pH with the Universal pH Indicator paper, transfer with a
在用广泛pH试纸来检查pH值时，先用玻璃棒把一滴溶液转移到
Exterior tension and osculatory horn measure a result to make clear, increase as exterior activator pH indicator, pulp foaming characteristic can increase, bleb annex action is abate, printing ink/pulp contacts horn to reduce, so, the water content in bubble and aerate pulp contains tolerance mediumly to increase, of printing ink but buoyancy is reduced.
表面张力和接触角测量结果表明，随着表面活性剂浓度的增大，纸浆起泡性能增强，气泡兼并功能减弱，油墨/纸浆接触角减小，所以，泡沫中的含水量和充气纸浆中的含气量增大，油墨的可浮性降低。
Than showing to the result, alignment of forecasts time of pH indicator of sand and dust and appear the happening of the sanded dust storm of the close upper zone of collosol of gas of many sand and dust time and intensity be identical.
比对结果显示，所预告的沙尘浓度的时间序列和出现大量沙尘气溶胶的近地表地区的沙尘暴的发生时间及强度吻合。
PH value can be an indicator for the biological performance of aerobic filter.
提出pH值可以作为好气滤池生物作用的指示参数。
The possibility of using the fluorescent nanoparticles as new fluorescent indicator for pH determination was also investigated.
然而方法和技术在不断推陈出新，pH检测新原理与新技术的开发与研究仍是当前的一个热点。
In the meantime, still studied PH indicator imprints to planar shoe the mechanism that undertakes chemistry increases.
同时，还研究了PH指示剂对平面鞋印进行化学增强的机理。
Using EDTA as titratant, murexide as indicator, sodium tartrate ammonium fluoride and sodium thiosulfate as masking agent, nickle concentration was determined in ammonic medium.
以EDTA为滴定剂，紫脲酸铵为指示剂，NH4F、酒石酸钾钠、Na2S2O3为掩蔽剂，在氨性介质中测定镍的浓度；在pH值为8.0的氨-氯化铵缓冲液中，采用滴定比色法测得钴的浓度。
Research adds low pH indicator in gas mixture CO air air packs pair of cooling porky to last the effect, determine the microbial, manage in process of keep in storage is changed and organic index change, the air of cooling pork air that suits certainly packs gas mixture scale to be 1%CO/50%CO2/49%N2, not only lengthened goods shelves period, and refrigerative flesh is in whole goods shelves period inside present inviting bright red.
探究在混合气体中添加低浓度的CO气调包装对冷却猪肉的保鲜效果，测定贮存过程中的微生物、理化和感官指标的变化，确定适合的冷却猪肉气调包装混合气体比例为1%CO/50%CO2/49%N2，不但延长了货架期，而且使冷却肉在整个货架期内呈现诱人的亮红色。
The effects of the various experimental conditions such as pH, coexist iron and colloid on the adsorption were investigated with the 238U and 90Sr as indicator respectively. The maximum adsorption distribution coefficient of U and Sr on the site's soil are 11300 and 723 mL/g, respectively. The concentration relationship in aqueous solu...
研究结果表明：场址土壤对U、Sr的最大分配系数分别为11300和723 mL/g；U、Sr的吸附均符合Fruendlich等温吸附方程；当pH为4~8时，铀的吸附分配比最大，而锶的分配系数最小；Ca2+和Mg2+的引入均能降低土壤对U、Sr的吸附，且对Sr的影响大于对铀的影响；在CO32-和C2O42-浓度很低时，能显著降低U的吸附分配系数；而CO32-的存在能够增大其对Sr的吸附；Fe3胶体的存在使U、Sr的吸附分配系数显著降低；腐殖酸的存在使土壤对U的吸附减弱，但能够增大Sr在土壤中的吸附。
It uses distilled water and alcohol to refine water soluble acid and alkali of sample and then test the extractive with PH indicator.
用蒸馏水或乙醇水溶液抽提试样中的水溶性酸或碱，然后用酸度计或指示剂对抽提物进行测定。
After 6 h baking of stone coal from Jishou at 850 ℃, vanadium ion indicator electrode was applied in extraction of vanadium from the roasted stone coal by acid leaching to monitor the concentration of V on-line for dynamics investigation. The influence of mineral size, pH and the temperature of leaching on the electrode potential—time curves was investigated.
摘 要：以湘西吉首某地石煤矿为原料，在850 ℃焙烧6 h后，采用酸浸法从焙烧料提取钒，用钒离子指示电极在线跟踪石煤浸出过程中五价钒浓度的变化，研究浸出过程中的动力学；考察矿石粒径、pH值和浸出温度对浸出过程 E — t 曲线的影响。
The company host camp product has the gas station special-purpose flare; Each kind of model leads the oil pump; Accelerator; Oil pot fluid position meter; Dives the oil pump; Each kind of oil pumping, offshore oil delivery rubber tube and PVC tube, train crane tube, fuel depot metal vlexible hose; Each kind of model flow indicator, tank car pump; Static electricity earth alarm apparatus, (PC16, PH 8) froth producer, and each kind of fire equipment; All-weather respiration valve, automobile breather valve and so on each kind of valve and fast attachment, fire resistance ventilation hat and so on 400 products.
公司主营产品有加油站专用照明灯；各种型号导油泵；加油机；油罐液位仪；潜油泵；各种抽油、卸油胶管及PVC管、火车鹤管、油库金属软管；各种型号流量表，槽车泵；静电接地报警器、（PC16、PH 8）泡沫产生器、及各种消防器材；全天候呼吸阀、汽车通气阀等各种阀门及快速接头、阻火透气帽等400余种产品。