OSCILLOMETRIC INSTRUMENT FOR THE NONINVASIVE DETECTION OF LOW-LEVEL MICROBIAL ACTIVITY .1. APPARATUS

被引：4

作者：

BLAKECOLEMAN, BC

COSSAR, JD

CLARKE, DJ

RAMSAY, C

机构：

[1] BACTOMAT LTD,HENLEY ON THAMES RG9 1HG,OXON,ENGLAND

[2] PUBL HLTH LAB SERV,CTR APPL MICROBIOL & RES,DIV BIOTECHNOL,SALISBURY SP4 0JG,WILTS,ENGLAND

来源：

BIOSENSORS & BIOELECTRONICS | 1990年 / 5卷 / 03期

关键词：

conductimetry; microbial enumeration; microbial impedimetry; oscillometry;

D O I：

10.1016/0956-5663(90)80012-3

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

A significant improvement in the design ofthe oscillometer and its use as an analytical instrument for microbial conductimetric and enzyme evaluations is reported. Employing a novel hybrid test cell and specialised amplifier circuits, a very high resolution of greater than 5 × 10-9 is obtained over a conductivity band of 6 mS cm-1 in the range 1·4-22 mS cm-1. Design considerations emphasise the nature of the amplifier/cell arrangement unlike many previous studies, which tended to understate practical design constraints. Such treatments typically ignored the value of complementary cell/amplifier action, focusing on theoretical models of test cell operation and behaviour. Performance and calibration data are presented based on electrolytes and non-polar liquid dielectrics. © 1990.

引用

页码：235 / 258

页数：24

共 43 条

[1] NON-INTRUSIVE VERY HIGH-FREQUENCY CONDUCTIVITY DETECTOR FOR CONTINUOUS-FLOW MONITORING [J].