指示剂

Upon the addition of a good starch indicator a blue solution results.

加入好的淀粉溶液指示剂，这时溶液变成兰色。

Reports and data provided include: downloadable annotated reports with data relating to the water quality (including trace metal concentrations) of the Forth Estuary between the years 1980-99, water quality standards for various coastal stretches in East Scotland, water quality classification schemes and resultant data (excellent - poor) for rivers, estuaries and coastal waters, bathing water data (1998 - 2001), SEPA indicator measurements for surface water quality, and a national archive of water quality data taken from 230 sites around Scotland which is used to estimate the river-borne input of selected contaminants to the sea and investigate long-term trends in main determinands.

其中包括：可下载报告全文，并带有1980-1999年Forth河口水质的相关数据，东苏格兰海岸不同的水质标准，水质分类方案及河流、河口、沿海、浴水的合成数据（1998-2001年），苏格兰环境保护机构的地表水质指示剂测定法和国家水质档案资料（水样取自苏格兰各地230个点位，常用于估计河流承受的污染物输入和调查长期趋势）。

Using PAN as indicator and CuSO4 as indirect titrant the aluminium content is determined.

用氢氧化钠溶液溶解样品的同时将铁与铝分离，加入过量的EDTA与铝络合，以PAN为指示剂，用硫酸铜标准溶液间接滴定法测定铝。

For example, an oxidation-reduction titration using potassium permanganate (pink/purple) as the titrant does not require an indicator.

例如，一种以高锰酸钾为滴定液的氧化－还原滴定就不需要指示剂。

A new method of oscillographic titration for the determination of nitrogen content in flour is described The sample was digested with H 2SO 4 Na 2SO 4 CuSO 4 Oscillographic titration is conducted on NH + 4 with Na TPB method,then calculate the nitrogen content Compared with standard methods,this method choose innoxious titrant,has a sharp titration endpoint, needs no distillation absorption and indicator It has the advantages of being easy and quick in operation,and the determination re...

研究了面粉中蛋白质含量的示波滴定法。样品用H2 SO4 Na2 SO4 CuSO4 消化处理，N以NH4 +的形式存在于试液中，用过量四苯硼钠沉淀铵，沉淀过滤，过量的四苯硼钠用氯化四乙基铵标准溶液返滴定，以四苯硼钠切口消失为终点，计算出氮含量，再换算为蛋白质含量。与通用的标准分析方法相比较，本方法所用试剂无毒，终点变化敏锐，不需蒸馏吸收，不外加指示剂，具有操作简便、快速，测定结果准确可靠。

Before any sterilisation process is adopted its suitability for the product and its efficacy in achieving the desired sterilising conditions in all parts of each type of load to be processed should be demonstrated by physical measurements and by biological indicators where appropriate.

在采用任何一种灭菌方法前，其对产品的适应性，和在灭菌产品的各种装载情况的每一个部分达到期望的灭菌状态的有效性，要在适当情况下，用实际的测量或生物指示剂的方法进行证明。

And the influence of the ancient activity on the clay mineral is low. So the ingredient and content of clay mineral may be taken as the climatic indicator.

通过对比探讨了古人类活动对黏土矿物的影响尺度，认为古人类活动的影响较低，黏土矿物的成分和含量可以作为气候变化的指示剂。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。