pH试纸

  • 中文名:pH试纸
  • 英文名:PH TEST STRIPS PH RANGE 4.5-10.0
  • 分类:广范试纸和精密试纸
  • 作用:检验溶液及气体酸碱度
  • 应用领域:科研、环保、食品安全、医药、军工、电子、轻工、石油化工等领域
  • 特点:PH试纸上有甲基红、溴甲酚绿、百里酚蓝三种指示剂

pH试纸产品介绍

简介

pH试纸是一种基于pH指示剂法,用于检验溶液及气体酸碱度的试纸。按照测定pH值范围主要分为广范试纸和精密试纸,广泛应用于科研、环保、食品安全、医药、军工、电子、轻工、石油化工等领域。
PH试纸

用途

pH试纸用来粗略测量溶液pH大小(或酸碱性强弱)。pH试纸遇到酸碱性强弱不同的溶液时,显示出不同的颜色,可与标准比色卡对照确定溶液的pH值。

使用方法

检验溶液的酸碱度:撕掉一条pH试纸,用胶头滴管滴上溶液,半秒变色后跟包装上的比色卡作对比;或者取少量溶液,直接用试纸沾湿液体,半秒后跟包装上比色卡对比;也可以取一小块试纸在表面皿或玻璃片上,用洁净干燥的玻璃棒蘸取待测液点滴于试纸的中部,观察变化稳定后的颜色,与标准比色卡对比,判断溶液的性质。

检验气体的酸碱性:先用蒸馏水把pH试纸润湿,粘在玻璃棒的一端,再送到盛有待测气体的容器口附近,观察颜色的变化,判断气体的性质。(试纸不能触及器壁)

注意事项

1、试纸不可直接伸入溶液。

2、试纸不能测浓硫酸的pH。

3、试纸不可接触试管口、瓶口、导管口等。

4、测定溶液的pH时,试纸不可事先用蒸馏水润湿,因为润湿试纸相当于稀释被检验的溶液,这会导致测量不准确。正确的方法是用蘸有待测溶液的玻璃棒点滴在试纸的中部,待试纸变色后,再与标准比色卡比较来确定溶液的pH。

5、取出试纸后,应将盛放试纸的容器盖严,以免被实验室的一些气体沾污,必须在常温下使用,否则会导致结果不准确。

pH试纸供应商筛选

生化试剂 试纸 PH试纸 PH试纸,UNIVERSAL,FOURSQUARESWITHDIFFERENTINDICATORSONEACHSTRIP,0-14PHRANGE PH试纸,INTERMEDIATE,THREESQUARESWITHDIFFERENTINDICATORSONEACHSTRIP,0-6PHRANGE PH试纸,13PACKAGESOF100PHSTRIPSEACHCOVERING0-2.5,2.6-4.5,4-7,6.5-10,11-13PHRANGES PH试纸,INTERMEDIATE,THREESQUARESWITHDIFFERENTINDICATORSONEACHSTRIP,2-9PHRANGE PH试纸,INTERMEDIATE,THREESQUARESWITHDIFFERENTINDICATORSONEACHSTRIP,7.5-14PHRANGE PH试纸,INTERMEDIATE,THREESQUARESWITHDIFFERENTINDICATORSONEACHSTRIP,5-10PHRANGE ColorpHast pH Strips, Narrow, two squares with single indicators on each strip, 0-2.5 pH range ColorpHast pH Strips, Intermediate, three squares with different indicators on each strip, 2-9 pH range ColorpHast pH Strips, Narrow, two squares with single indicators on each strip, 11-13 pH range ColorpHast pH Strips, Intermediate, three squares with different indicators on each strip, 7.5-14 pH range ColorpHast pH Strips, Intermediate, three squares with different indicators on each strip, 5-10 pH range ColorpHast Store, 13 packages of 100 pH strips each covering 0-2.5, 2.6-4.5, 4-7, 6.5-10, 11-13 pH ranges ColorpHast pH Strips, Universal, four squares with different indicators on each strip, 0-14 pH range ColorpHast pH Strips, Narrow, two squares with single indicators on each strip, 6.5-10 pH range ColorpHast pH Strips, Narrow, two squares with single indicators on each strip, 4-7 pH range ColorpHast pH Strips, Narrow, two squares with single indicators on each strip, 2.5-4.5 pH range ColorpHast pH Strips, Intermediate, three squares with different indicators on each strip, 0-6 pH range pH Box Indicator Papers, contains 3 rolls, each 15 feet in a plastic dispenser, 0.5-13 pH range pH Box Indicator Paper Refills, 6 each, 0.5-5 pH range PH TEST STRIPS PH RANGE 4.5-10.0