日本三菱化学 AQUAMICRON 卡尔费休试剂Q&A
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KF reagent
Q.01 I want to obtain the material safety data sheet (SDS) of the KF reagent.
Ans.
The SDS is distributed at this site. If you register here, you will become possible to download in the page of SDS.
The SDS is distributed at this site. If you register here, you will become possible to download in the page of SDS.
Q.02 I want to obtain the study report (COA) of the KF reagent.
Ans.
The study report is distributed at this site. It can be downloaded in the page of the study report (COA).
The study report is distributed at this site. It can be downloaded in the page of the study report (COA).
Q.03 Warranty period of the KF reagent?
Ans.
The warranty period is the period after manufacture in the unopened condition as shown below.
The warranty period is the period after manufacture in the unopened condition as shown below.
| Reagents for coulometric titration method | Anolyte/catholyte/electrolyte solutions | 5 years |
| Titrant for volumetric titration method | Titers of 1 mg, 3 mg, 5 mg and 10 mg | 3 years |
| Dehydrating solvent for volumetric titration method | Various | 5 years |
| Water standard sample | Water standard solution of 10 mg | 5 years |
| Water standard solutions of 1 mg, 0.2 mg and 0.1 mg | 3 years | |
| Solid water standard sample | 5 years | |
| Related articles | Standard water-methanol | 3 years |
The lot number shows the alphabets, A, B or C, the month of manufacture, 1, 2, 3, etc., and the first 2 digits of the figure show the year of manufacture (last 2 digits of the year).
Example) D05123 means the manufacture in April 2005.
Q.01我想获得kf试剂的材料安全数据表(sds)。
答。
SDS在本站点分发。如果您在这里注册，您将可以在SDS页面下载。
Q.02我想要kf试剂的研究报告(coa)。
答。
研究报告在本网站发布。可在研究报告(COA)页面下载。
Q.03 kf试剂的保修期?
答。
保修期是指在未开封条件下生产后的保修期，如下图所示。
Apparatus (moisture measuring system)
Q.01 The method and frequency of calibration of the moisture measuring system?
Ans.
For the measuring system, “calibration” is not necessary, but it is recommended to confirm the accuracy by measuring the standard sample.
In a volumetric titration method, it is important to determine the titer of titrant exactly. It is appropriate to calibrate the system at the time of changing the titrant and once about 2 weeks, but it is more reliable to confirm the accuracy before determination of the sample every day. In a coulometric titration method, the accuracy shall be confirmed by measuring the standard samples or water. In the presence of any abnormality, maintenance shall be conducted by cleaning the electrodes, or changing the reagent to obtain normal values.
For the measuring system, “calibration” is not necessary, but it is recommended to confirm the accuracy by measuring the standard sample.
In a volumetric titration method, it is important to determine the titer of titrant exactly. It is appropriate to calibrate the system at the time of changing the titrant and once about 2 weeks, but it is more reliable to confirm the accuracy before determination of the sample every day. In a coulometric titration method, the accuracy shall be confirmed by measuring the standard samples or water. In the presence of any abnormality, maintenance shall be conducted by cleaning the electrodes, or changing the reagent to obtain normal values.
Q.02 The method of cleaning when the electrode is contaminated?
Ans.
The detecting electrode shall be cleaned by wiping gently with a paper wiper. An extreme change in the distance between platinum electrodes or the way of polishing to scratch the electrode shall be avoided. If the cathode chamber (electrolysis cell) for coulometric titration method is contaminated, it shall be washed with solvents such as alcohols. If it is severely contaminated, it shall be washed gently with a toothbrush immersed in neutral detergent, rinsed gently with water and dried sufficiently. Attention shall be paid not to break the platinum wire.
The detecting electrode shall be cleaned by wiping gently with a paper wiper. An extreme change in the distance between platinum electrodes or the way of polishing to scratch the electrode shall be avoided. If the cathode chamber (electrolysis cell) for coulometric titration method is contaminated, it shall be washed with solvents such as alcohols. If it is severely contaminated, it shall be washed gently with a toothbrush immersed in neutral detergent, rinsed gently with water and dried sufficiently. Attention shall be paid not to break the platinum wire.
Q.03 Is there any difference between the temperature set for water vaporizer and the actual temperature?
Ans.
The set temperature is accurate at the position of thermoelectric couple. Since this is not a thermal analyzer, however, it shall be understood that the set temperature is not strictly consistent with the sample temperature.
The set temperature is accurate at the position of thermoelectric couple. Since this is not a thermal analyzer, however, it shall be understood that the set temperature is not strictly consistent with the sample temperature.
Q.04 oes the flow of the carrier gas influence on the value in the water vaporization method?
Ans.
It was confirmed that the flow within the normal range of use did not influence on the measured values.
It was confirmed that the flow within the normal range of use did not influence on the measured values.
Q.05 I want to purchase the moisture measuring system and equipments.
Ans.
The moisture measuring system is sold by Nittoseiko Analytech Co., Ltd.. The inquiry about the system is also received by this company.
The moisture measuring system is sold by Nittoseiko Analytech Co., Ltd.. The inquiry about the system is also received by this company.
Q.06 Trouble shooting when anodic solution becomes brown before end-point or dark brown at end-point in coulometric titration.
Ans.
To shorten an analysis time and/or gain more accurate results by cleaning an electrode tip when dehydration is not completed although Iodine exists sufficiently in excess or dehydration requires a longer time.
To shorten an analysis time and/or gain more accurate results by cleaning an electrode tip when dehydration is not completed although Iodine exists sufficiently in excess or dehydration requires a longer time.
Q.07 Trouble shooting when solvent becomes brown before end-point or dark brown at end-point in volumetric titration.
Ans.
To shorten an analytical time and/or gain more accurate results by cleaning an electrode tip, when dehydration is not completed although Iodine exists sufficiently in excess or dehydration requires a longer time.
To shorten an analytical time and/or gain more accurate results by cleaning an electrode tip, when dehydration is not completed although Iodine exists sufficiently in excess or dehydration requires a longer time.
Q.08 How to validate Moisture Meter by using AQUAMICRON Water Standard.
Ans.
To validate Coulometric moisture meter by using AQUAMICRON Water Standard.
To validate Coulometric moisture meter by using AQUAMICRON Water Standard.
仪器(水分测量系统)
Q.01湿度测量系统的校正方法和频率?
答。
对于测量系统，不需要“校准”，但建议通过测量标准样品来确认精度。
在容量滴定法中，准确地确定滴定剂的效价是很重要的。在改变滴定液时和2周左右对系统进行一次校准较为合适，但在每天测定样品前确认准确度更为可靠。在库仑滴定法中，应通过测量标准样品或水来确定准确度。出现异常时，应通过清洗电极或更换试剂以获得正常值进行维护。
Q.02电极被污染时的清洗方法?
答。
检测电极应用刮纸器轻轻擦拭。应避免铂电极之间的距离或抛光方式发生极端变化而划伤电极。库仑滴定法阴极室(电解槽)如有污染，应用酒精等溶剂清洗。如果污染严重，应用牙刷浸入中性洗涤剂轻轻清洗，用水轻轻冲洗，并充分晾干。注意不要折断铂金线。
Q.03汽化器设定的温度与实际温度是否有差异?
答。
热电偶位置设定温度准确。然而，由于这不是一台热分析仪，需要理解的是，设定的温度与样品温度并不是严格一致的。
Q.04载气的流量对水汽化法的数值有影响吗?
答。
经确认，在正常使用范围内的流量对测量值没有影响。
我想采购湿度测量系统和设备。
答。
湿度测量系统由Nittoseiko Analytech Co.Ltd销售。这个公司也收到了关于这个系统的询问。
Q.06库仑滴定中阳极溶液在终点前变成棕色或终点变成深棕色时的处理问题。
答。
为了缩短分析时间和/或通过在脱水未完成时清洗电极尖端来获得更准确的结果，尽管碘存在足够多或脱水需要更长的时间。找到这个文件。
Q.07在体积滴定中，当溶剂在终点前变成棕色或在终点变成深棕色时，问题的解决。
答。
为了缩短分析时间和/或通过清洗电极尖端获得更准确的结果，当脱水没有完成时，尽管碘存在足够多或脱水需要更长的时间。找到这个文件。
Q.08如何使用AQUAMICRON水标验证湿度计。
答。
用AQUAMICRON水标对库仑湿度计进行验证。
找到这个文件。
Q.01湿度测量系统的校正方法和频率?
答。
对于测量系统，不需要“校准”，但建议通过测量标准样品来确认精度。
在容量滴定法中，准确地确定滴定剂的效价是很重要的。在改变滴定液时和2周左右对系统进行一次校准较为合适，但在每天测定样品前确认准确度更为可靠。在库仑滴定法中，应通过测量标准样品或水来确定准确度。出现异常时，应通过清洗电极或更换试剂以获得正常值进行维护。
Q.02电极被污染时的清洗方法?
答。
检测电极应用刮纸器轻轻擦拭。应避免铂电极之间的距离或抛光方式发生极端变化而划伤电极。库仑滴定法阴极室(电解槽)如有污染，应用酒精等溶剂清洗。如果污染严重，应用牙刷浸入中性洗涤剂轻轻清洗，用水轻轻冲洗，并充分晾干。注意不要折断铂金线。
Q.03汽化器设定的温度与实际温度是否有差异?
答。
热电偶位置设定温度准确。然而，由于这不是一台热分析仪，需要理解的是，设定的温度与样品温度并不是严格一致的。
Q.04载气的流量对水汽化法的数值有影响吗?
答。
经确认，在正常使用范围内的流量对测量值没有影响。
我想采购湿度测量系统和设备。
答。
湿度测量系统由Nittoseiko Analytech Co.Ltd销售。这个公司也收到了关于这个系统的询问。
Q.06库仑滴定中阳极溶液在终点前变成棕色或终点变成深棕色时的处理问题。
答。
为了缩短分析时间和/或通过在脱水未完成时清洗电极尖端来获得更准确的结果，尽管碘存在足够多或脱水需要更长的时间。找到这个文件。
Q.07在体积滴定中，当溶剂在终点前变成棕色或在终点变成深棕色时，问题的解决。
答。
为了缩短分析时间和/或通过清洗电极尖端获得更准确的结果，当脱水没有完成时，尽管碘存在足够多或脱水需要更长的时间。找到这个文件。
Q.08如何使用AQUAMICRON水标验证湿度计。
答。
用AQUAMICRON水标对库仑湿度计进行验证。
找到这个文件。
Water determination
Q.01 Why the count decreases during determination in a coulometric titration method?
Ans.
This event occurs when the “titration continuation time” is set and becomes lower than the BG level at the start of determination. An extremely low moisture level in the sample and an interfering reaction (oxidation of iodide) with oxidative substances are assumed.
This event occurs when the “titration continuation time” is set and becomes lower than the BG level at the start of determination. An extremely low moisture level in the sample and an interfering reaction (oxidation of iodide) with oxidative substances are assumed.
Q.02 Is 100% of the moisture in the sample extracted in a volumetric titration method?
Ans.
It is desirable to dissolve the sample in a dehydrating solvent, but it is considered that the moisture in the sample can be extracted if it is not dissolved but dispersed uniformly. According to the sample, extraction may be insufficient in the cases of nonuniform liquid or large masses, but the moisture is generally extracted very quickly into dehydrating solvents.
It is desirable to dissolve the sample in a dehydrating solvent, but it is considered that the moisture in the sample can be extracted if it is not dissolved but dispersed uniformly. According to the sample, extraction may be insufficient in the cases of nonuniform liquid or large masses, but the moisture is generally extracted very quickly into dehydrating solvents.
Q.03 Why the value is different between the loss on drying method and the KF method?
Ans.
The circumstances are different according to the sample. If the value is higher in the loss on drying method, loss of substances other than the moisture due to heating is considered. If the value is higher in the KF method, it is considered that interference reactions may occur in the KF reaction. There is a measuring method to prevent interfering reactions. If you are not sure about this matter, please contact us.
The circumstances are different according to the sample. If the value is higher in the loss on drying method, loss of substances other than the moisture due to heating is considered. If the value is higher in the KF method, it is considered that interference reactions may occur in the KF reaction. There is a measuring method to prevent interfering reactions. If you are not sure about this matter, please contact us.
Q.04 The precisions of analysis and the lower limits of quantification of coulometric titration method and volumetric titration method?
Ans.
Various factors, including the type of sample, the amount of moisture, the handling method of samples, the level of proficiency of operation and the conditions of apparatus and reagents, are involved in the precision of analysis and the lower limit of quantification. The measure of the performance of analysis is as shown below.
Measure of the amount of moisture (analytical value) and relative standard deviation
Various factors, including the type of sample, the amount of moisture, the handling method of samples, the level of proficiency of operation and the conditions of apparatus and reagents, are involved in the precision of analysis and the lower limit of quantification. The measure of the performance of analysis is as shown below.
Measure of the amount of moisture (analytical value) and relative standard deviation
水的决心
Q.01为什么库仑滴定法测定时计数会下降?
答。
当“滴定持续时间”被设定并在测定开始时低于BG水平时，就会发生此事件。假定样品中的水分水平极低，并与氧化物质发生干扰反应(碘化物氧化)。
Q.02样品中100%的水分是用体积滴定法提取的吗?
答。
将样品溶解在脱水溶剂中是可取的，但认为样品中的水分如果不溶解而是均匀分散，则可以提取。根据样品，在液体不均匀或质量较大的情况下，萃取可能不足，但水分通常很快被提取到脱水溶剂中。
Q.03为什么干燥法和KF法的损失值不同?
答。
情况因样本而异。如果该值在干燥方法上的损失较高，则考虑由于加热造成的水分以外的物质损失。如果KF法中数值较高，则认为KF反应中可能发生干扰反应。有一种防止干扰反应的测量方法。如果您对此事不确定，请与我们联系。
Q.04库仑滴定法和容积滴定法的分析精度和定量下限?
答。
样品的种类、水分量、样品的处理方法、操作熟练程度、仪器和试剂的条件等因素都影响分析的精密度和定量下限。分析性能的度量如下所示。
Q.01为什么库仑滴定法测定时计数会下降?
答。
当“滴定持续时间”被设定并在测定开始时低于BG水平时，就会发生此事件。假定样品中的水分水平极低，并与氧化物质发生干扰反应(碘化物氧化)。
Q.02样品中100%的水分是用体积滴定法提取的吗?
答。
将样品溶解在脱水溶剂中是可取的，但认为样品中的水分如果不溶解而是均匀分散，则可以提取。根据样品，在液体不均匀或质量较大的情况下，萃取可能不足，但水分通常很快被提取到脱水溶剂中。
Q.03为什么干燥法和KF法的损失值不同?
答。
情况因样本而异。如果该值在干燥方法上的损失较高，则考虑由于加热造成的水分以外的物质损失。如果KF法中数值较高，则认为KF反应中可能发生干扰反应。有一种防止干扰反应的测量方法。如果您对此事不确定，请与我们联系。
Q.04库仑滴定法和容积滴定法的分析精度和定量下限?
答。
样品的种类、水分量、样品的处理方法、操作熟练程度、仪器和试剂的条件等因素都影响分析的精密度和定量下限。分析性能的度量如下所示。
水分量(解析值)和相对标准偏差的测量
| Coulometric titration method |
Relative standard deviation (RSD) |
Volumetric titration method |
|---|---|---|
| Less than 100 ug | 10% to within 30% | Less than 1 mg |
| 100 to 1000 ug | Within 5% | 1 to 5 mg |
| More than 1000 ug | Within 3% | More than 5 mg |
Q.05 Operating suggestions for the measurement of trace moisture in plastics.
Ans.
Trace moisture measurement in plastics is one of the important inspection items. Careful operation is needed to protect dried plastics from being affected by moisture absorption.
Trace moisture measurement in plastics is one of the important inspection items. Careful operation is needed to protect dried plastics from being affected by moisture absorption.
Q.06 Do you have any visual instructions for the beginner of KF measurement?
Ans.
It will help you to understand easily once you watch this instruction video.
It will help you to understand easily once you watch this instruction video.
Q.05塑料中微量水分测量的操作建议。
答。
塑料中微量水分的测定是重要的检测项目之一。需要小心操作，以保护干燥的塑料不受吸湿的影响。
Q.06对于KF测量的初学者，是否有任何直观的说明?
答。
看完这段教学视频，你会更容易理解。
答。
塑料中微量水分的测定是重要的检测项目之一。需要小心操作，以保护干燥的塑料不受吸湿的影响。
Q.06对于KF测量的初学者，是否有任何直观的说明?
答。
看完这段教学视频，你会更容易理解。